Energy position of maxima in response functions of ²H nucleus with q = 1 - 1,5 fm⁻¹
The problem of measuring a quasielastic electron scattering peak energy on nuclei is discussed.
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Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2000
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| Cite this: | Energy position of maxima in response functions of ²H nucleus with q = 1 - 1,5 fm-1 / A.Yu. Buki, N.G. Shevchenko, I.A. Nenko, A.A. Khomich, S.A. Pashchuk, I.G. Evseev // Вопросы атомной науки и техники. — 2000. — № 2. — С.16. — Бібліогр.: 6 назв. — англ. |
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nasplib_isofts_kiev_ua-123456789-821632025-02-23T20:20:34Z Energy position of maxima in response functions of ²H nucleus with q = 1 - 1,5 fm⁻¹ Энергетическое положение максимума в функциях отклика ядра ²H при q = 1 - 1,5 фм⁻¹ Buki, A.Yu. Shevchenko, N.G. Nenko, I.A. Khomich, A.A. Pashchuk, S.A. Evseev, I.G. Nuclear reactions The problem of measuring a quasielastic electron scattering peak energy on nuclei is discussed. The work was fulfilled according to the treaty of cooperation between NSC KIPT and CEFET-PR: “Acordo de cooperacao entre o Instituto de Fisica e Tecnologia de Kharkov (Ucraina) e o Centro Federal de Educacao Tecnologica do Parana de Curitiba (CEFET-PR)” from October 21, 1998. 2000 Article Energy position of maxima in response functions of ²H nucleus with q = 1 - 1,5 fm-1 / A.Yu. Buki, N.G. Shevchenko, I.A. Nenko, A.A. Khomich, S.A. Pashchuk, I.G. Evseev // Вопросы атомной науки и техники. — 2000. — № 2. — С.16. — Бібліогр.: 6 назв. — англ. 1562-6016 https://nasplib.isofts.kiev.ua/handle/123456789/82163 PACS: 25.30.Fj, 27.10.+h en Вопросы атомной науки и техники application/pdf Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
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Nuclear reactions Nuclear reactions |
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Nuclear reactions Nuclear reactions Buki, A.Yu. Shevchenko, N.G. Nenko, I.A. Khomich, A.A. Pashchuk, S.A. Evseev, I.G. Energy position of maxima in response functions of ²H nucleus with q = 1 - 1,5 fm⁻¹ Вопросы атомной науки и техники |
| description |
The problem of measuring a quasielastic electron scattering peak energy on nuclei is discussed. |
| format |
Article |
| author |
Buki, A.Yu. Shevchenko, N.G. Nenko, I.A. Khomich, A.A. Pashchuk, S.A. Evseev, I.G. |
| author_facet |
Buki, A.Yu. Shevchenko, N.G. Nenko, I.A. Khomich, A.A. Pashchuk, S.A. Evseev, I.G. |
| author_sort |
Buki, A.Yu. |
| title |
Energy position of maxima in response functions of ²H nucleus with q = 1 - 1,5 fm⁻¹ |
| title_short |
Energy position of maxima in response functions of ²H nucleus with q = 1 - 1,5 fm⁻¹ |
| title_full |
Energy position of maxima in response functions of ²H nucleus with q = 1 - 1,5 fm⁻¹ |
| title_fullStr |
Energy position of maxima in response functions of ²H nucleus with q = 1 - 1,5 fm⁻¹ |
| title_full_unstemmed |
Energy position of maxima in response functions of ²H nucleus with q = 1 - 1,5 fm⁻¹ |
| title_sort |
energy position of maxima in response functions of ²h nucleus with q = 1 - 1,5 fm⁻¹ |
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Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
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2000 |
| topic_facet |
Nuclear reactions |
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https://nasplib.isofts.kiev.ua/handle/123456789/82163 |
| citation_txt |
Energy position of maxima in response functions of ²H nucleus with q = 1 - 1,5 fm-1 / A.Yu. Buki, N.G. Shevchenko, I.A. Nenko, A.A. Khomich, S.A. Pashchuk, I.G. Evseev // Вопросы атомной науки и техники. — 2000. — № 2. — С.16. — Бібліогр.: 6 назв. — англ. |
| series |
Вопросы атомной науки и техники |
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2025-11-25T03:56:44Z |
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ENERGY POSITION OF MAXIMA IN RESPONSE FUNCTIONS
OF 2H NUCLEUS WITH q = 1 − 1,5 fm-1
A.Yu. Buki, N.G. Shevchenko, I.A. Nenko, A.A. Khomich
National Science Center “Kharkov Institute of Physics and Technology”, Kharkov, Ukraine
S.A. Pashchuk, I.G. Evseev
Centro Federal de Educacao Tecnologica do Parana de Curitiba (CEFET-PR), Brazil
The problem of measuring a quasielastic electron scattering peak energy on nuclei is discussed.
PACS: 25.30.Fj, 27.10.+h
The energy of a peak maximum in quasielastic ele-
ctron scattering (QES) on nuclear nucleons is designated
as ε and is measured from the energy of elastic electron
scattering on the nucleon with the same transfer 3-mo-
menta q, that corresponds to a maximum of this peak.
The theoretical works [1,2] and some others show that
the calculation of ε(q) depends on the choice of a nucle-
on potential type. Some of calculated ε(q) functions
have a minimum for q < 1.5 fm−1, where some minimum
in data of ε measurements on the 12C nucleus [3] is ob-
served too. But the result interpretation of such data in
the aspect of [1,2] is faced with two difficulties:
I. Originally the experimental ε were defined from
dependencies of twice differential cross sections d2σ on
the transfer energy ω (values ε obtained by this way we
designate as εσ). This cross section is a sum of longitudi-
nal RL and transverse RT response functions:
d2σ ≅ σM(G(q))2{RL(q,ω)+[0.5+tg(θ/2)]RT(q,ω)},
where σM is the Mott cross section, G(q) is the proton
electric form factor, θ is the angle of electron scattering.
It was showed (e.g., see [2] ) that εL , corresponding to
the RL-function and εT − RT-function, are unequal. So, ac-
cording to the equation for d2σ, the value εσ is in the in-
terval εL − εT and the result of the εσ measurement de-
pends on the choice of the angle θ.
II. With the reducing q the QES peak is displaced on
ω into the area of excitation of nuclear bound states
(NBS), such as giant resonances, and then the experi-
mental ε correspond to the sum peak maximum of nu-
clear electrodisintegration but it is not a peak of QES
described by theoretical calculations.
The experiment has shown that really εL ≠ εT [4], and
the dependence of εT on q at q ≤ 1.3 fm−1 is completely
described by the calculation in which the function ε(q) is
specified by NBS excitation [5,6]. Analysis of these re-
sults in view of the giant resonance systematic leads to
the conclusion, that for small transfer momentum the
measurement of εL and εT, which characterize QES, is
rather difficult. The 2H nucleus is interesting because it
has no excitation states and thus there is a possibility to
study ε of QES at small q experimentally.
In the present paper we use the results of measure-
ment of the RL- and RT-functions of the 2H nucleus at the
linac LUE-300 KIPT and obtain the ε values for
q = 1 − 1.5 fm−1. We have determined for the 2H nucleus
εL − εT ≈ 1 MeV. The obtained εT values are shown in the
figure by circles. Also, for comparison, on the figure the
εT-data from [5] and [6] for 6Li (triangles) and 4He
(squares) respectively are quoted. One can see that at
q < 1.5 fm−1 for ε of the 2H nucleus there is no the depen-
dence on q, that is character for ε of other nuclei. This
difference in the behavior of dependences of ε on q is a
confirmation of NBS role in shaping the maximum peak
of nuclear electrodisintegation.
So obtained experimental ε of the 2H nucleus allow
extending an area of the calculations checking of a peak
QES energy position at q less than 1.5 fm−1.
The work was fulfilled according to the treaty of co-
operation between NSC KIPT and CEFET-PR: “Acordo
de cooperacao entre o Instituto de Fisica e Tecnologia
de Kharkov (Ucraina) e o Centro Federal de Educacao
Tecnologica do Parana de Curitiba (CEFET-PR)” from
October 21, 1998.
REFERENCES
1. R. Rosenfelder. On the shift of the quasielastic
peak in inelastic electron scattering // Phys. Lett. 1978,
v. 79B, p. 15-18.
2. A.Yu. Korchin, A.V. Shebeco. Quasifree peak
parameters and sum rules for electron scattering on 4He
// Z. Phys. 1981, v. A299, p. 131-137.
3. A.Yu. Buki et al. Investigation quasielastic elec-
tron scattering on 12C nucleus // Ukr. Fiz. Zhurn. 1983,
v. 28, p. 1654-1657 (in Russian).
4. A.Yu. Buki et al. Quasielastic elektron scatter-
ing on 4He, 12C nuclei and twobody interechion of nucle-
ons // Yad. Fiz. 1984, v. 39, p. 1323-1325 (in Russian).
5. A.Yu. Buki et al. Energy peak in electron
quasielastic scattering on 6Li // Yad. Fiz. 1988, v. 48.
p. 913-916 (in Russian).
6. A.Yu. Buki et al. Energy position of the 4He
electrodisintegration maximum for small transfer mo-
menta // Ukr. Fiz. Zhurn. 1995, v. 40, p. 913-915 (in
Ukr.).
16 ВОПРОСЫ АТОМНОЙ НАУКИ И ТЕХНИКИ. 2000, №2.
Серия: Ядерно-физические исследования (36), с. 16.
.
A.Yu. Buki, N.G. Shevchenko, I.A. Nenko, A.A. Khomich
National Science Center “Kharkov Institute of Physics and Technology”, Kharkov, Ukraine
Centro Federal de Educacao Tecnologica do Parana de Curitiba (CEFET-PR), Brazil
The problem of measuring a quasielastic electron scattering peak energy on nuclei is discussed.
References
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