A system for polymer film irradiation with heavy ions accelerated to the energy of 1 MeV/u
At the Kharkov heavy ion linear accelerator MILAC experimental investigations on irradiation polymer films
 with heavy ion beams are carried out with the aim of obtaining track-etched membranes. Presently, the MILAC prestripping
 section accelerates tripled-charged Ar₄₀³⁺ ions to t...
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| Опубліковано в: : | Вопросы атомной науки и техники |
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| Дата: | 2006 |
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Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2006
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | A system for polymer film irradiation with heavy ions accelerated to the energy of 1 MeV/u / V.A. Bomko, M.T. Bryk, A.F. Dyachenko, A.V. Zabotin, B.V. Zajtsev, V.V. Zhuk, V.G. Zhuravlev,
 A.F. Kobets, A.I. Kravchenko, M.S. Lesnykh, V.N. Reshetnikov
 // Вопросы атомной науки и техники. — 2006. — № 2. — С. 193-195. — Бібліогр.: 7 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1860133771786846208 |
|---|---|
| author | Bomko, V.A. Bryk, M.T. Dyachenko, A.F. Zabotin, A.V. Zajtsev, B.V. Zhuk, V.V. Zhuravlev, V.G. Kobets, A.F. Kravchenko, A.I. Lesnykh, M.S. Reshetnikov, V.N. |
| author_facet | Bomko, V.A. Bryk, M.T. Dyachenko, A.F. Zabotin, A.V. Zajtsev, B.V. Zhuk, V.V. Zhuravlev, V.G. Kobets, A.F. Kravchenko, A.I. Lesnykh, M.S. Reshetnikov, V.N. |
| citation_txt | A system for polymer film irradiation with heavy ions accelerated to the energy of 1 MeV/u / V.A. Bomko, M.T. Bryk, A.F. Dyachenko, A.V. Zabotin, B.V. Zajtsev, V.V. Zhuk, V.G. Zhuravlev,
 A.F. Kobets, A.I. Kravchenko, M.S. Lesnykh, V.N. Reshetnikov
 // Вопросы атомной науки и техники. — 2006. — № 2. — С. 193-195. — Бібліогр.: 7 назв. — англ. |
| collection | DSpace DC |
| container_title | Вопросы атомной науки и техники |
| description | At the Kharkov heavy ion linear accelerator MILAC experimental investigations on irradiation polymer films
with heavy ion beams are carried out with the aim of obtaining track-etched membranes. Presently, the MILAC prestripping
section accelerates tripled-charged Ar₄₀³⁺ ions to the energy of 1 MeV/u with the intensity of 10⁹…10¹⁰ particles/s.
To provide uniform track distribution with the specified density and orientation in the polymer film a system
of ion irradiation was developed on the basis of electrostatic scanning device
На Харьковском линейном ускорителе тяжелых ионов ЛУМЗИ проводятся экспериментальные исследования по облучению пучками тяжелых ионов полимерной пленки для получения трековых мембран. В настоящее время предобдирочная секция ускорителя ЛУМЗИ ускоряет трехзарядные ионы аргона Ar₄₀³⁺ до энергии 1 МэВ/нуклон с интенсивностью 10⁹…10¹⁰ част./с. Для обеспечения равномерного распределения треков в полимерной пленке с заданной плотностью и направленностью треков разработана система ионного облучения. Работа выполнена по гранту №2476.
На Харківському лінійному прискорювачі важких іонів ЛУМЗІ проводяться експериментальні
дослідження по опроміненню пучками важких іонів полімерної плівки для одержання трекових мембран. На
цей час передобдиркова секція прискорювача ЛУМЗІ прискорює тризарядні іони аргону Ar₄₀³⁺ до енергії 1 МеВ/нуклон з інтенсивністю 10⁹…10¹⁰ част./с. Для забезпечення рівномірного розподілу треків у полімерній плівці із заданою щільністю и спрямованістю треків розроблена система іонного опромінення.
Робота виконана по гранту №2476.
|
| first_indexed | 2025-12-07T17:45:49Z |
| format | Article |
| fulltext |
A SYSTEM FOR POLYMER FILM IRRADIATION WITH HEAVY IONS
ACCELERATED TO THE ENERGY OF 1 MeV/u
V.A. Bomko, M.T. Bryk, A.F. Dyachenko, A.V. Zabotin, B.V. Zajtsev, V.V. Zhuk, V.G. Zhu-
ravlev, A.F. Kobets, A.I. Kravchenko, M.S. Lesnykh, V.N. Reshetnikov
NSC KIPT, Kharkov, Ukraine
E-mail: kobets@kipt.kharkov.ua
At the Kharkov heavy ion linear accelerator MILAC experimental investigations on irradiation polymer films
with heavy ion beams are carried out with the aim of obtaining track-etched membranes. Presently, the MILAC pre-
stripping section accelerates tripled-charged Ar40
3+ ions to the energy of 1 MeV/u with the intensity of 109…1010 par-
ticles/s. To provide uniform track distribution with the specified density and orientation in the polymer film a sys-
tem of ion irradiation was developed on the basis of electrostatic scanning device.
The work was supported by STCU grant # 2476.
PACS: 29.17.+w;61.80.Jh
1. INTRODUCTION
Polymer track-etched membranes take a special
place among microfiltering membranes of various types
due to the outstanding uniformity of pore distribution in
sizes and orientation. Technology of the track-etched
membrane production is well known; it is based on irra-
diation thin polymer films with high energy heavy ions
and subsequent physical and chemical treatment of the
irradiated films [1]. As a result, through pores are gener-
ated in the polymer film; their diameters depend both on
parameters of bombarding particles and on conditions of
treatment. To obtain calibrated pores cylindrical in
shape the etching rate along the tracks should be essen-
tially higher than the etching rated of undamaged poly-
mer. To increase imperfection of the polymer in the
zone of the tracks and etching rate along the tracks the
polymer films are irradiated with heavier ions, and vari-
ous sensitization procedures are used before chemical
etching.
In NSC KIPT there operates the MILAC heavy ion
linear accelerator [2,3] which accelerates ions within
rather wide range of masses to the energy of 8.5 MeV/u.
Presently, experimental investigations on irradiation the
polymer films with heavy ion beams with the aim of ob-
taining track-etched membranes are being carried out at
the MILAC accelerator [4]. In the MILAC prestripping
section triple-charge Ar40
3+ ions were accelerated to the
energy of 1 MeV/u with the intensity of 109…1010 parti-
cles/s; PETF films 6…10 µm thick were irradiated, and
after subsequent physical and chemical treatment it was
possible to obtain experimental samples of track-etched
membranes with through pores from 2 to 0.05 µm in di-
ameter [5]. To provide uniform track distribution in the
polymer film with the specified density and orientation
a system for ion irradiation of polymer film with hori-
zontal beam scanning with the frequency of 20 kHz and
sinusoidal voltage up to 20 kV was developed.
2. PRESTRIPPING SECTION OF THE MI-
LAC LINEAR ACCELERATOR
The MILAC heavy ion linear accelerator consists of
injector (1), prestripping (2) and main (3) accelerating
sections. The structural scheme of the accelerator is giv-
en in the Fig.1.
Reconstruction of the MILAC prestripping and main
sections was performed on the basis of interdigital (IH)
structure that was developed in KIPT [2,3]. For the first
time this promising accelerating structure was intro-
duced in the large operating accelerator and demonstrat-
ed its high efficiency.
Fig.1. Structural scheme of the MILAC heavy ion linear
accelerator
The prestripping section 4 m in length with the
transverse dimensions 0.9×1.1 m with A/q =15 acceler-
ates ion at the frequency of 47.2 MHz from 33 keV/u to
1 MeV/u with the intensity of the accelerated beam of
1012 particles/s; the main section accelerates ions with
A/q =5 at the frequency of 47.2 MHz to 8.5 MeV/u with
the intensity of the accelerated beam up to
1010 particles/s. The accelerating structure of IH-type of
the MILAC prestripping section provides the accelera-
tion rate of 3.5 MeV/m with the uniform distribution of
the accelerating field in the gaps between drift tubes [6].
Thus, with the average electric field gradient in the ac-
celerating gaps of 91 kV/cm at the length of about 4 m
the ions with A/q =15 are accelerated to 1 MeV/u. In the
rectangular cavity at the beginning and end of the struc-
ture original resonance end adjustment elements are
formed which allowed to create the uniform distribution
of the accelerating field along the overall structure.
3. ION IRRADIATION SYSTEM
Polymer film irradiation is carried out with argon
ions accelerated at the prestripping section of the MI-
LAC linear accelerator to 1 MeV/u. Main requirements
on the track-etched membrane parameters are reduced
to necessity to provide the same pore diameter with the
spread in diameters no more than 1%, and the same den-
sity of the openings over the all membrane surface with
the error of no more than 10%. High uniformity of pore
___________________________________________________________
PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. 2006. № 2.
Series: Nuclear Physics Investigations (46), p.193-195. 193
distribution over the membrane surface is essentially
necessary for applications in radio-electronic industry as
different kinds of masks for manufacturing microchip and
semiconductor instruments, and for creation the edge ar-
rays for cold cathodes.
The system for polymer film irradiation is dedicated
for forming the tracks of the specified orientation and
high uniformity of distribution of the openings in the
track-etched membrane. There exist different methods
for obtaining the uniform particle distribution on the tar-
get. The simplest and commonest of them is the beam
sweeping in the horizontal plane with an electrostatic or
magnetic scanner. In this case, in vertical direction the
beam sweeping is achieved due to the film transporta-
tion with a tape drive.
Each of the listed methods for sweeping (either elec-
trostatic or magnetic) has advantages and drawbacks.
The electrostatic scanner is simple in manufacture; how-
ever, its application in the ion irradiation system may
lead to some technical difficulties rise. For example,
corona discharge in the place of the scanner plates loca-
tion in the ion channel, and also high requirements on
the insulator inputs of the scanning plates. The drawbacks
of the magnetic scanner lie in nonlinearity of the current
in the magnet windings causing the field nonuniformity,
and also the high cost and complexity of the linear cur-
rent generator. The system for ion irradiation of the MI-
LAC accelerator is based on the electrostatic scanner (in
the given case the electrostatic scanner was chosen due to
availability of the appropriate element base).
The system for ion irradiation includes: stripping
chamber, beam forming system, deflecting magnet, mea-
suring unit, scanner, irradiation chamber with a tape
drive, system of vacuum pumping-out. The schematic view
of the system for ion irradiation is given in the Fig.2.
Fig.2. The scheme of the ion irradiation system
In the stripping chamber the ion charge increases.
The beam of the charged ions passing the special strip-
ping foils loses several electrons from the upper shell
increasing their charges in that way. Application of
recharging (stripping) in the heavy ion linear accelerator
gives a possibility to broaden the range of ions being ac-
celerated and to increase the acceleration rate in the fol-
lowing sections. For irradiation the polymer film higher
charge of ions is necessary in order to simplify bending
the beam with the deflecting magnet and beam sweep-
ing and scanning.
For recharging triple-charged argon ions accelerated
to 1 MeV/u, a solid target 16…20 mm in diameter in the
form of a thin carbon film with the density of 1017…
1018 atoms per cm2 is used. After passing the stripping
carbon target the components of the accelerated beam
(Ar11+, Ar12+, and Ar13+) are generated which are approxi-
mately equal in intensity (25…30% of initial value).
The deflecting magnet directs the accelerated beam
of twelve-charged argon ions from the accelerator axis
into the system of scanning and ion irradiation; the
beam profile is imparted the necessary geometry (1 cm
in horizontal direction and 6 cm in vertical direction)
with electromagnetic quadrupole lenses assembled in
doublets and triplets.
The scanning device serves for sweeping Ar12+
beams in horizontal plane; it consists of a sweep genera-
tor and deflecting plates. Any of the three forms of volt-
ages (sinusoidal, sawtooth, or triangular) may be ap-
plied to the plates of this scanner; but only their linear
part would be used. Linearity of this part should be no
worse than 5%. The main advantage of this scanner is
its capability of scanning accelerated ion beam in the
wide frequency range due to the fact that ion beam ac-
celeration occurs in the pulsed mode with duration the
flat part of RF envelope up to t = 500 µs.
At the initial stage sinusoidal voltage was chosen for
scanning the ion beams at the frequency of
fo = k/t = 20 kHz with the number of scanning periods
within the pulse duration, k = 10.
Energy of the accelerated ions is 1 MeV/u, charge
Z = +12, mass number A = 40, width of the film being
irradiated b = 30 cm, distance between the scanner and
the target L = 7 m, dimensions of the plates of the elec-
trostatic scanner are: length – 50 cm, width – 10 cm.
With these parameters the amplitude of the electric field
intensity Ea = (α1β2ΑΕo)/(ZeL1) ≈ 2.8 kV/cm. Then with
distances between scanner plates 7 cm the amplitude of
the voltage difference between the plates will be
Ua = +19 kV.
Thus, a generator of high sinusoidal voltage with
amplitude of +20 kV and frequency up to 20 kHz is nec-
essary to create the scanning device. The self-contained
generator circuit was chosen on GI-39B pulse generator
triode with transformer feedback and series feeding on
the anode of the tube in the mode of anode modulation.
Bias voltage is applied to the triode grid automatically.
The oscillating circuit built on the six capacitors of
K15Y-1-470 type and three windings on the ferrite ring:
W1 outline winding has 40 turns, feedback winding W2
has 3 turns, and W3 load winding has 400 turns. A lock-
ing choke is used. The generator operates in the pulse
mode.
The ion channel (Fig.3) represents a vacuum cham-
ber of alternating cross-section 8 m in length provided
with the system of high vacuum pumping including
three oil-vapor diffusion pump assemblies with the total
pumping rate of 3000 l/s. The length of the ion channel
defines the necessary beam spread in the horizontal
plane over the target being irradiated.
Fig.3. The photo of the ion irradiation system
188
In the irradiation chamber the tape drive of the tape
recorder type supplies the polymer film to the zone of
irradiation with the rate of 1…5 m/s.
The minimum diameter and cylindrical shape of the
pores in the track-etched membrane is achieved the easi-
er the higher is the atomic number of accelerated ions
which irradiate the polymer film. Thus, in order to in-
crease the mass and intensity of ions accelerated to
1 MeV/u a new prestripping section of the MILAC ac-
celerator rated for A/q ≤ 16 and frequency 23.6 MHz is
presently developed; it is based on the interdigital accel-
erating structure combining alternating phase focusing
and RF quadrupoles [7]. The calculations show that the
two methods for RF focusing combined will allow ac-
celeration of heavy ion beams without preliminary ac-
celeration in the RFQ structure. This will create condi-
tions for track-etched membrane production, and allow
using heavy ion beams accelerated in the main section
to 8.5 MeV/u for reactor engineering and also solving
various problems in nuclear physics.
REFERENCES
1. G.N. Flerov, P.Uu. Apel, A.Yu. Didyk et al. Appli-
cation of heavy ion accelerators for etched mem-
brane production: Preprint JINR Р7-88-696, Dub-
na, 1988, 12 p.
2. V.О. Bomko, A.P. Kobets, Yu.P. Mazalov,
B.I. Rudjak. KIPT heavy ion linear accelerator //
Ukr. Phys. Journ. 1998, v.43, N 9, p.1144.
3. V.A. Bomko, A.F. Dyachenko, A.P. Kobets et. al.
Interdigital accelerating H-structure in the multi-
charged ion linac (MILAC) // Rev. Sc. Instr. 1998,
v.69, N 10, pp.3537-3540.
4. V.О. Bomko, А.М. Yegorov, B.V. Zajtsevet et al.
Development of the complex for track-etched mem-
brane production on the basis of Kharkiv heavy ion
linear accelerator // NaUKMA Proc. 2003, v.22,
part III, Kyiv, p.472.
5. М.Т. Bryk, I.V. Vorobyova, T.G. Garbovitskaya et
al. Investigations of chemical etching of the tracks
of high energy Ar ions in PETF films // Bulletin of
Karazin Kharkiv National University. Series:
Physics. 2005, N 651, Kharkiv, p.8.
6. V.A. Bomko, A.F. Dyachenko, A.F. Kobets et al.
Prestripping section of multiple charged ions with
A/q = 15 // Problems of Atomic Science and Tech-
nology. Series: Nuclear Physics Investigations.
1989, №6(6), p.23-27.
7. V.A. Bomko, S.A. Borsuk, A.F. Dyachenko at el.
Tuning the Cells of the Accelereting Structure with
RF Quadrupole Doublets. Proc. of the ХIХ Ru-
PAC. Dubna. 2004, p.321-323.
СИСТЕМА ОБЛУЧЕНИЯ ПОЛИМЕРНОЙ ПЛЕНКИ ТЯЖЕЛЫМИ ИОНАМИ, УСКОРЕННЫМИ
ДО ЭНЕРГИИ 1 МэВ/нукл.
В.А. Бомко, М.Т. Брык, А.Ф. Дьяченко, А.В. Заботин, Б.В. Зайцев, В.В. Жук, В.Г. Журавлев, А.Ф. Кобец,
А.И. Кравченко, М.С. Лесных, В.Н. Решетников
На Харьковском линейном ускорителе тяжелых ионов ЛУМЗИ проводятся экспериментальные исследо-
вания по облучению пучками тяжелых ионов полимерной пленки для получения трековых мембран. В на-
стоящее время предобдирочная секция ускорителя ЛУМЗИ ускоряет трехзарядные ионы аргона Ar40
+3 до
энергии 1 МэВ/нуклон с интенсивностью 109…1010 част./с. Для обеспечения равномерного распределения
треков в полимерной пленке с заданной плотностью и направленностью треков разработана система ионно-
го облучения. Работа выполнена по гранту №2476.
СИСТЕМА ОПРОМІНЕННЯ ПОЛІМЕРНОЇ ПЛІВКИ ВАЖКИМИ ІОНАМИ, ПРИСКОРЕНИМИ
ДО ЕНЕРГІЇ 1 МеВ/нукл.
В.О. Бомко, М.Т. Брик, О.Ф. Дьяченко, О.В. Заботін, Б.В. Зайцев, В.В. Жук, В.Г. Журавльов, А.П. Кобець,
А.І. Кравченко, М.С. Лєсних, В.М. Решетніков
На Харківському лінійному прискорювачі важких іонів ЛУМЗІ проводяться експериментальні
дослідження по опроміненню пучками важких іонів полімерної плівки для одержання трекових мембран. На
цей час передобдиркова секція прискорювача ЛУМЗІ прискорює тризарядні іони аргону Ar40
+3 до енергії
1 МеВ/нуклон з інтенсивністю 109…1010 част./с. Для забезпечення рівномірного розподілу треків у
полімерній плівці із заданою щільністю и спрямованістю треків розроблена система іонного опромінення.
Робота виконана по гранту №2476.
___________________________________________________________
PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. 2006. № 2.
Series: Nuclear Physics Investigations (46), p.193-195. 193
Система облучения полимерной пленки тяжелыми ионами, ускоренными до энергии 1 МэВ/нукл.
СИСТЕМА ОПРОМІНЕННЯ ПОЛІМЕРНОЇ ПЛІВКИ ВАЖКИМИ ІОНАМИ, ПРИСКОРЕНИМИ ДО ЕНЕРГІЇ 1 МеВ/нукл.
|
| id | nasplib_isofts_kiev_ua-123456789-78848 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1562-6016 |
| language | English |
| last_indexed | 2025-12-07T17:45:49Z |
| publishDate | 2006 |
| publisher | Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| record_format | dspace |
| spelling | Bomko, V.A. Bryk, M.T. Dyachenko, A.F. Zabotin, A.V. Zajtsev, B.V. Zhuk, V.V. Zhuravlev, V.G. Kobets, A.F. Kravchenko, A.I. Lesnykh, M.S. Reshetnikov, V.N. 2015-03-22T08:19:48Z 2015-03-22T08:19:48Z 2006 A system for polymer film irradiation with heavy ions accelerated to the energy of 1 MeV/u / V.A. Bomko, M.T. Bryk, A.F. Dyachenko, A.V. Zabotin, B.V. Zajtsev, V.V. Zhuk, V.G. Zhuravlev,
 A.F. Kobets, A.I. Kravchenko, M.S. Lesnykh, V.N. Reshetnikov
 // Вопросы атомной науки и техники. — 2006. — № 2. — С. 193-195. — Бібліогр.: 7 назв. — англ. 1562-6016 PACS: 29.17.+w;61.80.Jh https://nasplib.isofts.kiev.ua/handle/123456789/78848 At the Kharkov heavy ion linear accelerator MILAC experimental investigations on irradiation polymer films
 with heavy ion beams are carried out with the aim of obtaining track-etched membranes. Presently, the MILAC prestripping
 section accelerates tripled-charged Ar₄₀³⁺ ions to the energy of 1 MeV/u with the intensity of 10⁹…10¹⁰ particles/s.
 To provide uniform track distribution with the specified density and orientation in the polymer film a system
 of ion irradiation was developed on the basis of electrostatic scanning device На Харьковском линейном ускорителе тяжелых ионов ЛУМЗИ проводятся экспериментальные исследования по облучению пучками тяжелых ионов полимерной пленки для получения трековых мембран. В настоящее время предобдирочная секция ускорителя ЛУМЗИ ускоряет трехзарядные ионы аргона Ar₄₀³⁺ до энергии 1 МэВ/нуклон с интенсивностью 10⁹…10¹⁰ част./с. Для обеспечения равномерного распределения треков в полимерной пленке с заданной плотностью и направленностью треков разработана система ионного облучения. Работа выполнена по гранту №2476. На Харківському лінійному прискорювачі важких іонів ЛУМЗІ проводяться експериментальні
 дослідження по опроміненню пучками важких іонів полімерної плівки для одержання трекових мембран. На
 цей час передобдиркова секція прискорювача ЛУМЗІ прискорює тризарядні іони аргону Ar₄₀³⁺ до енергії 1 МеВ/нуклон з інтенсивністю 10⁹…10¹⁰ част./с. Для забезпечення рівномірного розподілу треків у полімерній плівці із заданою щільністю и спрямованістю треків розроблена система іонного опромінення.
 Робота виконана по гранту №2476. The work was supported by STCU grant # 2476. en Національний науковий центр «Харківський фізико-технічний інститут» НАН України Вопросы атомной науки и техники Применение ускорителей в радиационных технологиях A system for polymer film irradiation with heavy ions accelerated to the energy of 1 MeV/u Система облучения полимерной пленки тяжелыми ионами, ускоренными до энергии 1 МэВ/нукл. Система опромінення полімерної плівки важкими іонами, прискореними до енергії 1 МеВ/нукл. Article published earlier |
| spellingShingle | A system for polymer film irradiation with heavy ions accelerated to the energy of 1 MeV/u Bomko, V.A. Bryk, M.T. Dyachenko, A.F. Zabotin, A.V. Zajtsev, B.V. Zhuk, V.V. Zhuravlev, V.G. Kobets, A.F. Kravchenko, A.I. Lesnykh, M.S. Reshetnikov, V.N. Применение ускорителей в радиационных технологиях |
| title | A system for polymer film irradiation with heavy ions accelerated to the energy of 1 MeV/u |
| title_alt | Система облучения полимерной пленки тяжелыми ионами, ускоренными до энергии 1 МэВ/нукл. Система опромінення полімерної плівки важкими іонами, прискореними до енергії 1 МеВ/нукл. |
| title_full | A system for polymer film irradiation with heavy ions accelerated to the energy of 1 MeV/u |
| title_fullStr | A system for polymer film irradiation with heavy ions accelerated to the energy of 1 MeV/u |
| title_full_unstemmed | A system for polymer film irradiation with heavy ions accelerated to the energy of 1 MeV/u |
| title_short | A system for polymer film irradiation with heavy ions accelerated to the energy of 1 MeV/u |
| title_sort | system for polymer film irradiation with heavy ions accelerated to the energy of 1 mev/u |
| topic | Применение ускорителей в радиационных технологиях |
| topic_facet | Применение ускорителей в радиационных технологиях |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/78848 |
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