Astrophysical S-factor of T(4He, γ)7Li reaction at Ecm = 15.7 keV; Physics of Particles and Nuclei Letters; Vol. 14, iss. 4
| Parent link: | Physics of Particles and Nuclei Letters: Scientific Journal Vol. 14, iss. 4.— 2017.— [P. 560–570] |
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| Corporate Author: | |
| Other Authors: | , , , , , , , , , |
| Summary: | Title screen The astrophysical S-factor of the reaction T(4He, γ)7Li is measured for the first time at the center of mass energy Ecm = 15.7 keV, lower than the energy range of the Standard Big Bang Nucleosynthesis (SBBN) model. The experiment is performed on a Hall pulsed accelerator (TPU, Tomsk). An acceleration pulse length of 10 μs allows one to suppress the background of cosmic radiation and the ambient medium by five orders of magnitude. A beam intensity of ~ 5 × 10144He+ ions per pulse allows one to measure an extremely low reaction yield. The yield of γ-quanta with the energies Eγ0= 2483.7 keV and Eγ1= 2006.1 keV is registered by NaI(Tl) detectors with the efficiency ε = 0.331 ± 0.026. A method for direct measurement of the background from the chain of reactions T(4He, 4He)T→T(T, 2n)X→(n, γ) and/or (n, n′γ) which ends by neutron activation of materials surrounding the target is proposed and implemented in this study. The value of the astrophysical S-factor of the reaction T(4He, γ)7Li Sαt(Ecm = 15.7 keV) = 0.091 ± 0.032 keV b provides the choice from the set of experimental data for the astrophysical Sαt-factor in favor of experimental data [4] with Sαt(Ecm = 0) = 0.1067 ± 0.0064 keV b. Режим доступа: по договору с организацией-держателем ресурса |
| Language: | English |
| Published: |
2017
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1134/S1547477117040057 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=655142 |
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| 200 | 1 | |a Astrophysical S-factor of T(4He, γ)7Li reaction at Ecm = 15.7 keV |f V. M. Bystritsky [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: p. 570 (32 tit.)] | ||
| 330 | |a The astrophysical S-factor of the reaction T(4He, γ)7Li is measured for the first time at the center of mass energy Ecm = 15.7 keV, lower than the energy range of the Standard Big Bang Nucleosynthesis (SBBN) model. The experiment is performed on a Hall pulsed accelerator (TPU, Tomsk). An acceleration pulse length of 10 μs allows one to suppress the background of cosmic radiation and the ambient medium by five orders of magnitude. A beam intensity of ~ 5 × 10144He+ ions per pulse allows one to measure an extremely low reaction yield. The yield of γ-quanta with the energies Eγ0= 2483.7 keV and Eγ1= 2006.1 keV is registered by NaI(Tl) detectors with the efficiency ε = 0.331 ± 0.026. A method for direct measurement of the background from the chain of reactions T(4He, 4He)T→T(T, 2n)X→(n, γ) and/or (n, n′γ) which ends by neutron activation of materials surrounding the target is proposed and implemented in this study. The value of the astrophysical S-factor of the reaction T(4He, γ)7Li Sαt(Ecm = 15.7 keV) = 0.091 ± 0.032 keV b provides the choice from the set of experimental data for the astrophysical Sαt-factor in favor of experimental data [4] with Sαt(Ecm = 0) = 0.1067 ± 0.0064 keV b. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Physics of Particles and Nuclei Letters |o Scientific Journal | ||
| 463 | |t Vol. 14, iss. 4 |v [P. 560–570] |d 2017 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 701 | 1 | |a Bystritsky |b V. M. |g Vyacheslav Mikhaylovich | |
| 701 | 1 | |a Dudkin |b G. N. |c specialist in the field of nuclear physics |c Senior researcher of Tomsk Polytechnic University, Candidate of physical and mathematical sciences |f 1944- |g Gennadiy Nikolaevich |3 (RuTPU)RU\TPU\pers\34190 |9 17724 | |
| 701 | 1 | |a Emets |b E. G. |c physicist, specialist in the field of nuclear physics |c Engineer-designer of Tomsk Polytechnic University |f 1984- |g Evgeny Gennadievich |3 (RuTPU)RU\TPU\pers\33721 | |
| 701 | 1 | |a Filipovich |b M. |g Marius | |
| 701 | 1 | |a Krylov |b A. R. |g Aleksandr Romanovich | |
| 701 | 1 | |a Nechaev |b B. A. |c physicist |c leading engineer of Tomsk Polytechnic University |f 1945- |g Boris Aleksandrovich |3 (RuTPU)RU\TPU\pers\34601 | |
| 701 | 1 | |a Nurkin |b А. |c physicist |c engineer of Tomsk Polytechnic University |f 1991- |g Azamat |3 (RuTPU)RU\TPU\pers\39763 | |
| 701 | 1 | |a Padalko |b V. N. |c physicist |c Leading engineer of Tomsk Polytechnic University |f 1949- |g Vladimir Nikolaevich |3 (RuTPU)RU\TPU\pers\32978 | |
| 701 | 1 | |a Filippov |b A. V. |g Aleksandr Viktorovich | |
| 701 | 1 | |a Sadovsky |b A. B. |g Andrey Borisovich | |
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