Proton-unbound states in 24Al relevant for the 23Mg(p, γ) reaction in novae

被引：0

作者：

Vyfers, E. C. ^{[1
]}

Pesudo, V. ^{[1
,2
]}

Triambak, S. ^{[1
]}

Kamil, M. ^{[1
]}

Adsley, P. ^{[2
,3
]}

Brown, B. A. ^{[4
]}

Jivan, H. ^{[5
]}

Marin-Lambarri, D. J. ^{[1
,2
,6
]}

Neveling, R. ^{[2
]}

Ondze, J. C. Nzobadila ^{[1
]}

Papka, P. ^{[7
]}

Pellegri, L. ^{[2
,5
]}

Rebeiro, B. M. ^{[1
]}

Singh, B. ^{[1
]}

Smit, F. D. ^{[2
]}

Steyn, G. F. ^{[2
]}

机构：

[1] Univ Western Cape, Dept Phys & Astron, P-B X17, ZA-7535 Bellville, South Africa

[2] iThemba LABS, Box 722, ZA-7129 Somerset West, South Africa

[3] Texas A&M Univ, Cyclotron Inst, Dept Phys & Astron, College Stn, TX 77843 USA

[4] Michigan State Univ, Dept Phys & Astron, Facil Rare Isotope Beams, E Lansing, MI 48824 USA

[5] Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa

[6] Univ Nacl Autonoma Mex, Fac Quim, Dept Fisicoquim, Ciudad Univ, Mexico City 04510, Mexico

[7] Stellenbosch Univ, Dept Phys, Private Bag X1, ZA-7602 Stellenbosch, South Africa

来源：

PHYSICAL REVIEW C | 2024年 / 110卷 / 03期

基金：

美国国家科学基金会; 新加坡国家研究基金会;

关键词：

REACTION-RATES; GRAPHS; TABLES; DECAY;

D O I：

10.1103/PhysRevC.110.035803

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Background: The nucleosynthesis of several proton-rich nuclei is determined by radiative proton-capture reactions on unstable nuclei in nova explosions. One such reaction is 23 Mg( p , gamma ) 24 Al, which links the NeNa and MgAl cycles in oxygen-neon novae. Purpose: The purpose of our study is to extract 23 Mg( p , gamma ) resonance strengths from proton-unbound states in 24 Al, produced via the 24 Mg( 3 He , t ) reaction. Methods: A beam of 3 He 2 + ions at 50.7 MeV is used to produce the states of interest in 24 Al. Proton-triton angular correlations are measured with a K = 600 QDD magnetic spectrometer and a silicon detector array, located at iThemba LABS, South Africa. Results: We measure the excitation energies of the four lowest proton-unbound states in 24 Al and place lower limits on Gamma p/Gamma values for these four states. Together with shell-model calculations of partial gamma widths, the experimental data are also used to determine resonance strengths for the four lowest 23 Mg( p , gamma ) 24 Al resonances. Conclusions: The energy of the dominant first 23 Mg( p , gamma ) resonance is determined to be Er = 478 +/- 4 keV, with a resonance strength of omega gamma = 19 +/- 9 meV.

引用

页数：6

共 29 条

[1] CAKE: the coincidence array for K600 experiments [J].

Adsley, P. ;

Neveling, R. ;

Papka, P. ;

Dyers, Z. ;

Brummer, J. W. ;

Diget, C. Aa. ;

Hubbard, N. J. ;

Li, K. C. W. ;

Long, A. ;

Marin-Lambarri, D. J. ;

Pellegri, L. ;

Pesudo, V. ;

Pool, L. C. ;

Smit, F. D. ;

Triambak, S. .

JOURNAL OF INSTRUMENTATION, 2017, 12

[2] The AME2003 atomic mass evaluation (II). Tables, graphs and references [J].

Audi, G ;

Wapstra, AH ;

Thibault, C .

NUCLEAR PHYSICS A, 2003, 729 (01) :337-676

[3] Nuclear Data Sheets for A=24 [J].

Basunia, M. Shamsuzzoha ;

Chakraborty, Anagha .

NUCLEAR DATA SHEETS, 2022, 186 :3-262

[4] First direct measurement of the 23Mg(p,γ)24Al reaction [J].

Erikson, L. ;

Ruiz, C. ;

Ames, F. ;

Bricault, P. ;

Buchmann, L. ;

Chen, A. A. ;

Chen, J. ;

Dare, H. ;

Davids, B. ;

Davis, C. ;

Deibel, C. M. ;

Dombsky, M. ;

Foubister, S. ;

Galinski, N. ;

Greife, U. ;

Hager, U. ;

Hussein, A. ;

Hutcheon, D. A. ;

Lassen, J. ;

Martin, L. ;

Ottewell, D. F. ;

Ouellet, C. V. ;

Ruprecht, G. ;

Setoodehnia, K. ;

Shotter, A. C. ;

Teigelhoefer, A. ;

Vockenhuber, C. ;

Wrede, C. ;

Wallner, A. .

PHYSICAL REVIEW C, 2010, 81 (04)

[5] Thermonuclear reaction rate of 23Mg(p, γ)24Al [J].

Herndl, H ;

Fantini, M ;

Iliadis, C ;

Endt, PM ;

Oberhummer, H .

PHYSICAL REVIEW C, 1998, 58 (03) :1798-1803

[6] DECAY OF AL-24 AND AL-24(META) TO GAMMA-RAY AND ALPHA-PARTICLE EMITTING STATES IN MG-24 [J].

HONKANEN, J ;

KORTELAHTI, M ;

AYSTO, J ;

ESKOLA, K ;

HAUTOJARVI, A .

PHYSICA SCRIPTA, 1979, 19 (03) :239-244

[7] The DRAGON facility for nuclear astrophysics at TRIUMF-ISAC: design, construction and operation [J].

Hutcheon, DA ;

Bishop, S ;

Buchniann, L ;

Chatterjee, ML ;

Chen, AA ;

D'Auria, JM ;

Engel, S ;

Gigliotti, D ;

Greife, U ;

Hunter, D ;

Hussein, A ;

Jewett, CC ;

Khan, N ;

Lamey, M ;

Laird, AM ;

Liu, W ;

Olin, A ;

Ottewell, D ;

Rogers, JG ;

Roy, G ;

Sprenger, H ;

Wrede, C .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2003, 498 (1-3) :190-210

[8] Charged-particle thermonuclear reaction rates: II. Tables and graphs of reaction rates and probability density functions [J].

Iliadis, C. ;

Longland, R. ;

Champagne, A. E. ;

Coc, A. ;

Fitzgerald, R. .

NUCLEAR PHYSICS A, 2010, 841 :31-250

[9] The imprint of nova nucleosynthesis in presolar grains [J].

José, J ;

Hernanz, M ;

Amari, S ;

Lodders, K ;

Zinner, E .

ASTROPHYSICAL JOURNAL, 2004, 612 (01) :414-428

[10] Proton capture on 30P in novae: On the existence of states at 6.40 MeV and 6.65 MeV in 31S [J].

Kamil, M. ;

Triambak, S. ;

Ball, G. C. ;

Bildstein, V ;

Varela, A. Diaz ;

Faestermann, T. ;

Garrett, P. E. ;

Moradi, F. Ghazi ;

Hertenberger, R. ;

Kheswa, N. Y. ;

Mukwevho, N. J. ;

Rebeiro, B. M. ;

Wirth, H-F .

PHYSICAL REVIEW C, 2022, 105 (05)

← 1 2 3 →