Toward an experimentally determined 26Alm(p,γ)27Si reaction rate in ONe novae

被引：24

作者：

Deibel, C. M. ^{[1
,2
,3
]}

Clark, J. A. ^{[1
]}

Lewis, R. ^{[1
]}

Parikh, A. ^{[1
]}

Parker, P. D. ^{[1
]}

Wrede, C. ^{[1
]}

机构：

[1] Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA

[2] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

[3] Michigan State Univ, Joint Inst Nucl Astrophys, E Lansing, MI 48824 USA

来源：

PHYSICAL REVIEW C | 2009年 / 80卷 / 03期

关键词：

PROTON THRESHOLD STATES; AL-26; DECAYS; SI-27;

D O I：

10.1103/PhysRevC.80.035806

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：

Strong evidence of the nucleosynthesis of Galactic Al-26 has been found through measurements involving excesses in Mg-26 from the decay of Al-26 in meteoritic inclusions and the 1.809-MeV gamma-ray line detected by satellites such as CGRO and INTEGRAL. Several sites for the production of Al-26 have been suggested, including ONe novae. Destruction of Al-26 in ONe novae is possible via the reactions Al-26(g)(p,gamma)Si-27 and Al-26(m)(p,gamma)Si-27. In the present work, resonance parameters for the Al-26(m)(p,gamma)Si-27 reaction have been determined via studies of the Al-27(He-3,t)Si-27*(p)Al-26(m) and Si-28(He-3,alpha)Si-27*(p)Al-26(m) reactions. Several new Al-26(m) + p resonances have been discovered within 1 MeV above the proton threshold of 7.691 MeV. Excitation energies and proton-branching ratios for those and previously known states are reported.

引用

页数：8

共 35 条

[1] A compilation of charged-particle induced thermonuclear reaction rates [J].

Angulo, C ;

Arnould, M ;

Rayet, M ;

Descouvemont, P ;

Baye, D ;

Leclercq-Willain, C ;

Coc, A ;

Barhoumi, S ;

Aguer, P ;

Rolfs, C ;

Kunz, R ;

Hammer, JW ;

Mayer, A ;

Paradellis, T ;

Kossionides, S ;

Chronidou, C ;

Spyrou, K ;

Degl'Innocenti, S ;

Fiorentini, G ;

Ricci, B ;

Zavatarelli, S ;

Providencia, C ;

Wolters, H ;

Soares, J ;

Grama, C ;

Rahighi, J ;

Shotter, A ;

Rachti, ML .

NUCLEAR PHYSICS A, 1999, 656 (01) :3-183

[2]

[Anonymous], NATL NUCL DATA CTR I

[3] Astrophysically important 26Si states studied with the 28Si(p,t)26Si reaction.: II.: Spin of the 5.914-MeV 26Si level and galactic 26Al production [J].

Bardayan, D. W. ;

Howard, J. A. ;

Blackmon, J. C. ;

Brune, C. R. ;

Chae, K. Y. ;

Hix, W. R. ;

Johnson, M. S. ;

Jones, K. L. ;

Kozub, R. L. ;

Liang, J. F. ;

Lingerfelt, E. J. ;

Livesay, R. J. ;

Pain, S. D. ;

Scott, J. P. ;

Smith, M. S. ;

Thomas, J. S. ;

Visser, D. W. .

PHYSICAL REVIEW C, 2006, 74 (04)

[4] ION MICROPROBE EVIDENCE FOR PRESENCE OF EXCESS MG-26 IN AN ALLENDE ANORTHITE CRYSTAL [J].

BRADLEY, JG ;

HUNEKE, JC ;

WASSERBURG, GJ .

JOURNAL OF GEOPHYSICAL RESEARCH, 1978, 83 (NB1) :244-254

[5] THE ABUNDANCE OF AL-26 IN THE MGAL CYCLE [J].

BUCHMANN, L ;

HILGEMEIER, M ;

KRAUSS, A ;

REDDER, A ;

ROLFS, C ;

TRAUTVETTER, HP ;

DONOGHUE, TR .

NUCLEAR PHYSICS A, 1984, 415 (01) :93-113

[6]

CHEN AA, TRIUMF PROPOSA UNPUB

[7]

Deibel C. M., IN PRESS

[8]

DEIBEL CM, 2008, THESIS YALE U, P42502

[9]

DIEHL R, 1995, ASTRON ASTROPHYS, V298, P445

[10] Measuring 26Al and 60Fe in the Galaxy [J].

Diehl, Roland .

NEW ASTRONOMY REVIEWS, 2006, 50 (7-8) :534-539

← 1 2 3 4 →