7Be(p,γ)8b reaksiyasi quyosh-neytrino muammosida katta ahamiyatga ega [1] va kosmik qorong'i asrlarning oxirida hosil bo'lgan ilk yulduzlar evolyutsiyasida muhim rol o'ynaydi [2]

Munozara
Radiativ-tutuvchi 7Be(p,γ)8B reaksiya uchun astrofizik s omil modifikatsiyalangan R-matritsa usulida hisoblanadi. Astrophysical S omillar S_17 (0)=21.62 da 1.13 keV b va S_17 (25) keV=20.85 da 1.09 keV b olingan. Rezonanslar uchun γ-kenglik qiymati mos ravishda birinchi va ikkinchi rezonanslar uchun Γ^γ=13 eV va Γ^γ=70 eV topiladi.
References
1. Bahcall J.N., Neutrino Astrophysics (Cambridge Univ.Press, Cambridge,1989)
2. Bromm V, Larson R.B. The first stars. Annu Rev Astron Astrophys 2004; 42: 79-118.
3. Bahcall J.N., Bahcall N.A., and Ulrich R.K. Sensitivity of the Solar-Neutrino Fluxes. Astrophys.J. 1969; 156: 559.
4. DU XianChao, GUO Bing, Li ZhiHong, PANG Dan Yang, LI ErTao, LIU WeiPing. Determination of astrophysical reaction rates from the ⁷Li(d,p)⁸Li reaction// Physics, Mechanics&Astronomy 2015; 58 (6): 062001.
5. Trache L., Azhari A., Carstoiu F., Clark H.L., Gagliardi C.A. et al. Asymptotic normalization coefficients for from a study of // Physical Review C 2003; 67: 062801.
6. Howell D., Davids B., Greene J.P., Kanungo R., Mythili S., Ruiz C. et al. First determination of the ⁸Li valence neutron asymptotic normalization coefficient using the ⁷Li(⁸Li,⁷Li)⁸Li reaction. Physical Review C 2013; 88: 025804.
7. Pakou A., Keeley N., Cappuzzello F., Acosta L., Agodi C. et al. The ⁷Li(d,p)⁸Li reaction in inverse kinematics at 5.44 MeV/u. The European Physical Journal A 2017; 53: 167.
8. ZhiHong Li., ErTao LI, Jun SU, YunJu LI, XiXiang BAI et al. Study of the primordial lithium abundance // Science China: Physics, Mechanics & Astronomy 2011; 54(1): s67-s72.
9. S.B. Igamov, K.I. Tursunmakhatov. Results for the asymptotic normalization coefficients for the ⁸B nucleus in the (⁷Be+p)-channel from the analysis of the reaction. The bulletin of young scientists. №1 (3) 2019, p. 60-63.
10. Tursunmakhatov K.I., Yarmukhamedov R., and Igamov S.B.. Asympttic normalization coefficient for α+d→⁶Li from the peripheral direct capture d(α,γ)⁶Li reaction and the astrophysical S factor at Big Bang energies. EPJ Web of Conferences 2020; 227: 02016.
11. Yarmukhamedov R., Tursunmakhatov K.I. and Igamov S.B.. Dispersion (asymptotic) theory of charged-particle transfer reactions and nuclear astrophysics // EPJ Web of Conferences 2020; 227: 01019.
12. Mukhamedzhanov A.M., Clark H.L., Gagliardi C.A., Lui Y.-W. , Trache L., Tribble R.E., Xu H.M., Zhou X.G., Burjan V., Cejpek J., Kroha V., Carstoi F. Asymptotic normalization coefficients for //Physical Review C 1997; 56: 1302-1312.
13. Artemov S.V., Igamov S.B., Tursunmakhatov Q.I., and Yarmukhamedov R., Extrapolation of Astrophysical S Factors for the Reaction ¹⁴N(p,γ)¹⁵O to Near-Zero Energies// Physics of Atomic Nuclei, 2012; 75(3): 291-309.
14. Lane A.M. and Thomas R.G. R-Matrix Theory of Nuclear Reactions. Reviews of Modern Physics 1958; 30(2): 257-353.
15. Barker F.C. and Kajino T. The 12C(α,γ)16O Cross Section at Low Energies. Australian Journal of Physics 1991; 44: 369-396.
16. Holt R.J., Jacson H.E., Laszewski R.M., Laszewski R.M., Monahan J.E., and Specht J.R. Effects of channel and potential radiative transitions in the ¹⁷O(γ,n₀)¹⁶O reaction. Physical Review C 1978; 18(5): 1962-1972.
17. Vaughn F.J., Chalmers R.A., Kohler D., and Chase L.F., Cross Sections for the ⁷Be(p,γ)⁸B Reaction.// Physical Review C 1970; 2(5): 1657-1665.
18. Junghans A.R., Mohrmann E.C., Snover K.A., Steiger T.D., Adelberger E.G., et al. Precise measurement of the ⁷Be(p,γ)⁸B S Factor. Physical Review C 2003; 68: 065803.
19. Hammache F., Bogaert G., Aguer P., Angulo C., Barhoumi S., Brillard L., Chemin J.F., et al. Low-energy Measurement of the ⁷Be(p,γ)⁸B Cross Section// Physical Review Letters 2001; 86(18): 3985-3989.
20. B.W. Filippone, A. J. Elwyn , C. N. Davids , D. D. Koetke. Proton capture cross section of 7Be and the flux of high energy solar neutrinos. Physical Review C 1983; 28(6): 2222-2229.
21. F.Hammache, G. Bogaert, P. Aguer, C. Angulo, S. Barhoumi et al. New Measurement and Analysis of the ⁷Be(p,γ)⁸B Cross Section. Physical Review Letters 1998; 80(5): 928-931.
22. F. Strieder, L. Gialanella, G. Gyurky, F. Schurman, R. Bonetti et al. Absolyut cross section of ⁷Be(p,γ)⁸B. Nuclear Physics A 2001; 696: 219-230.
23. A. Azhari, V. Burjan, F. Carstoiu, C. A. Gagliardi, V. Kroha et al. Asymptotic normalization coefficients and the ⁷Be(p,γ)⁸B astrophysical S factor. Physical Review C 2001; 63: 055803.
24. O.R. Tojiboev, R. Yarmukhamedov, S.V. Artemov and S.B. Sakuta. Asymptotic normalization coefficients for ⁷Be+p→⁸B from the peripheral ⁷Be(d,n)⁸B reaction and their astrophysical application. Physical Review C 2016; 94: 054616.
25. G. Tabacaru, A. Azhari, J. Brinkley, V. Burjan, F. Carstoiu et al. Scattering of ⁷Be and ⁸B and the astrophysical S₁₇ factor. Physical Review C 2006; 73: 025808.
26. Ogata K, Yahiro M, Iseri Y. Determination of S₁₇ from 7Be(d,n)8B reaction. Physical Review C 2003; 67: 011602.
27.S.B.Igamov and R.Yarmukhamedov. Asymptotic Normalization Coefficients ( Nuclear Vertex Constants) for p+⁷Be→⁸B and the Direct ⁷Be(p,γ)⁸B Astrophysical S factors at Solar Energies. Physics of Atomic Nuclei, 2008; 71(10): 1740-1755.
28.T. Kikuchi, T. Motobayashi, N. Iwasa, Y. Ando, M. kurokawa et al. Further measurement of the ⁷Be(p,γ)⁸B cross section at low energies with the coulomb dissociation of ⁸B. The European Physical Journal A 1998; 3: 213-215.
29. F. Schumann, S. Typel, F. Hammache, K. Summerer, F. Uhlig et al. Low-energy cross section of the ⁷Be(p,γ)⁸B solar fusion reaction from the Coulomb dissociation of ⁸B. Physical Review C 2006; 73: 015806.
30. N.Iwasa, F. Boue, G. Surowka, K. Summerer, T. Baumann et al., Measurement of the Coulomb Dissociation of ⁸B at 254 MeV/nucleon and the ⁸B Solar Neutrino Flux. Physical Review Letters 1999; 83(15): 2910-2913.
31. E. G. Adelberger, A. Garcia, R. G. Hamish Robertson, K. A. Snover, A. B. Balantekin et al. Solar fusion cross sections. II. The pp chain and CNO cycles. Review of modern Physics 2011; 83: 195-245.
32. Ajzenberg-Selove F. Energy levels of light nuclei A=5-10. Nuclear Physics A 1988; 490:1-225.
33. L. T. Baby, C. Bordeanu, G. Goldring, M. Hass, L. Weissman et al. Precision Measurement of the ⁷Be(p,γ)⁸B Cross Section with an Implanted ⁷Be Target. Physical Review Letters 2003; 90(2): 022501-(1-4).