| 000 | 03849nlm1a2200445 4500 | ||
|---|---|---|---|
| 001 | 649857 | ||
| 005 | 20231030040926.0 | ||
| 035 | _a(RuTPU)RU\TPU\network\15027 | ||
| 035 | _aRU\TPU\network\14343 | ||
| 090 | _a649857 | ||
| 100 | _a20160829a2016 k y0engy50 ba | ||
| 101 | 0 | _aeng | |
| 135 | _adrcn ---uucaa | ||
| 181 | 0 | _ai | |
| 182 | 0 | _ab | |
| 200 | 1 |
_aA method for investigation of the D(4He, γ)6Li reaction in the Ultralow energy region under a high background _fV. M. Bystritsky [et al.] |
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| 203 |
_aText _celectronic |
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| 300 | _aTitle screen | ||
| 320 | _a[References: p. 30 (30 tit.)] | ||
| 330 | _aThe cosmological lithium problem, that is, a noticeable discrepancy between the predicted and observed abundances of lithium, is in conflict with the Standard Big Bang Nucleosynthesis model. For example, the abundance of 7Li is 2-4 times smaller than predicted by the Standard Big Bang Nucleosynthesis. As to the abundance of 6Li, recent more accurate optical investigations have yielded only the upper limit on the 6Li/7Li ratio, which makes the problem of 6Li abundance and accordingly of disagreement with the Standard Big Bang Nucleosynthesis predictions less acute. However, experimental study of the D(4He, γ)6Li reaction cross section is still of current importance because there is a theoretical approach predicting its anomalously large value in the region of energies below the Standard Big Bang Nucleosynthesis energy. The work is dedicated to the measurement of the cross section for the D(4He, γ)6Li reaction proceeding in zirconium deuteride at the incident 4He+ion energy of 36 keV. The experiment is performed at a pulsed Hall plasma accelerator with an energy spread of 20% FWHM. A method for direct measurement of the background from the reaction chain D(4He,4He)D→D(D, n)3He→(n, γ) and/or (n, n′γ) ending with activation of the surrounding material by neutrons is proposed and implemented in the work. An upper limit on the D(4He, γ)6Li reaction cross section σ≤7·10−36 cm2 at the 90% confidence level is obtained. | ||
| 333 | _aРежим доступа: по договору с организацией-держателем ресурса | ||
| 461 |
_tNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment _d1984- |
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| 463 |
_tVol. 825 _v[P. 24-30] _d2016 |
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| 610 | 1 | _aэлектронный ресурс | |
| 610 | 1 | _aтруды учёных ТПУ | |
| 701 | 1 |
_aBystritsky _bV. M. _gVyacheslav Mikhaylovich |
|
| 701 | 1 |
_aDudkin _bG. N. _cspecialist in the field of nuclear physics _cSenior researcher of Tomsk Polytechnic University, Candidate of physical and mathematical sciences _f1944- _gGennadiy Nikolaevich _2stltpush _3(RuTPU)RU\TPU\pers\34190 |
|
| 701 | 1 |
_aKrylov _bA. R. _gAleksandr Romanovich |
|
| 701 | 1 |
_aGazi _bS. _gStefan |
|
| 701 | 1 |
_aGuran _bYe. _gYezhek |
|
| 701 | 1 |
_aNechaev _bB. A. _cphysicist _cleading engineer of Tomsk Polytechnic University _f1945- _gBoris Aleksandrovich _2stltpush _3(RuTPU)RU\TPU\pers\34601 |
|
| 701 | 1 |
_aPadalko _bV. N. _cphysicist _cLeading engineer of Tomsk Polytechnic University _f1949- _gVladimir Nikolaevich _2stltpush _3(RuTPU)RU\TPU\pers\32978 |
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| 701 | 1 |
_aSadovsky _bA. B. _gAndrey Borisovich |
|
| 701 | 1 |
_aTuleushev _bYu. Zh. _gYury Zhianshakhovich |
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| 701 | 1 |
_aFilipovich _bM. _gMarius |
|
| 701 | 1 |
_aFilippov _bA. V. _gAleksandr Viktorovich |
|
| 712 | 0 | 2 |
_aНациональный исследовательский Томский политехнический университет (ТПУ) _bФизико-технический институт (ФТИ) _bЛаборатория № 33 ядерного реактора _h6474 _2stltpush _3(RuTPU)RU\TPU\col\19896 |
| 801 | 2 |
_aRU _b63413507 _c20161031 _gRCR |
|
| 856 | 4 | _uhttp://dx.doi.org/10.1016/j.nima.2016.04.034 | |
| 942 | _cCF | ||