A new measurement of the E1 amplitude in 12C(α,γ0)16O

被引：0

作者：

Gialanella, L ^{[1
]}

Aliotta, M

Rogalla, D

Rolfs, C

Schümann, F

Strieder, F

Theis, S

Trautvetter, HP

Campajola, L

Imbriani, G

Roca, V

Romano, M

D'Onofrio, A

Sabbarese, C

Terrasi, F

Agodi, C

Alba, R

Del Zoppo, A

Figuera, P

Sapienza, P

Spitaleri, C

Gyurky, G

Somorjai, E

Greife, U

机构：

[1] Ruhr Univ Bochum, Inst Expt Phys 3, Bochum, Germany

[2] Univ Naples Federico II, Dipartimento Sci Fisiche, Naples, Italy

[3] Ist Nazl Fis Nucl, I-80125 Naples, Italy

[4] Univ Naples 2, Dipartimento Sci Ambientali, Caserta, Italy

[5] Univ Naples 2, Dipartimento Sci Ambientali, Caserta, Italy

[6] Lab Nazl Sud, Catania, Italy

[7] ATOMKI, H-4001 Debrecen, Hungary

[8] Colorado Sch Mines, Golden, CO 80401 USA

来源：

NUCLEAR PHYSICS A | 2001年 / 688卷 / 1-2期

关键词：

D O I：

暂无

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：

The El amplitude of the transition to the ground state in the C-12(alpha, gamma)O-16 capture reaction was measured in the energy range E-cm=1.3 to 3.0 MeV using an intense C-12 beam in combination with a windowless He-4 gas target and an array of six 70% HPGe detectors. The detectors were placed in a ring-shaped geometry around the target at a distance of 17 cm on a plane perpendicular to the beam axis. A target length of 5.3 cm was defined by a 12.5 cm thick lead shielding. Passive and active shielding was used to achieve the necessary suppression of the beam induced and cosmic background. The results of this measurement and their extrapolation to the relevant energy during the helium burning phase in massive stars are reported.

引用

页码：254C / 258C

页数：5

共 12 条

[1] CONSTRAINTS ON THE LOW-ENERGY E1 CROSS-SECTION OF C-12(ALPHA,GAMMA-O-16 FROM THE BETA-DELAYED ALPHA-SPECTRUM OF N-16 [J].

AZUMA, RE ;

BUCHMANN, L ;

BARKER, FC ;

BARNES, CA ;

DAURIA, JM ;

DOMBSKY, M ;

GIESEN, U ;

JACKSON, KP ;

KING, JD ;

KORTELING, RG ;

MCNEELY, P ;

POWELL, J ;

ROY, G ;

VINCENT, J ;

WANG, TR ;

WONG, SSM ;

WREAN, PR .

PHYSICAL REVIEW C, 1994, 50 (02) :1194-1215

[2] RESONANCE STRENGTHS OF SOME LIGHT-NUCLEI [J].

BECKER, HW ;

KIESER, WE ;

ROLFS, C ;

TRAUTVETTER, HP ;

WIESCHER, M .

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 1982, 305 (04) :319-323

[3] HYDROGEN DEPTH PROFILING USING O-18 IONS [J].

BECKER, HW ;

BAHR, M ;

BERHEIDE, M ;

BORUCKI, L ;

BUSCHMANN, M ;

ROLFS, C ;

ROTERS, G ;

SCHMIDT, S ;

SCHULTE, WH ;

MITCHELL, GE ;

SCHWEITZER, JS .

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 1995, 351 (04) :453-465

[4]

*CERN LIB, 1993, GEANT 3 21

[5] C-12(ALPHA,GAMMA O-16) REACTION AND STELLAR HELIUM BURNING [J].

DYER, P ;

BARNES, CA .

NUCLEAR PHYSICS A, 1974, A233 (02) :495-520

[6] THE HE-4(C-12,GAMMA)O-16 REACTION AT STELLAR ENERGIES [J].

KETTNER, KU ;

BECKER, HW ;

BUCHMANN, L ;

GORRES, J ;

KRAWINKEL, H ;

ROLFS, C ;

SCHMALBROCK, P ;

TRAUTVETTER, HP ;

VLIEKS, A .

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 1982, 308 (01) :73-94

[7] COINCIDENCE MEASUREMENT OF THE CA-12(ALPHA,GAMMA)O-16 CROSS-SECTION AT LOW ENERGIES [J].

KREMER, RM ;

BARNES, CA ;

CHANG, KH ;

EVANS, HC ;

FILIPPONE, BW ;

HAHN, KH ;

MITCHELL, LW .

PHYSICAL REVIEW LETTERS, 1988, 60 (15) :1475-1478

[8] C-12(alpha,gamma)O-16 cross sections at stellar energies [J].

Ouellet, JML ;

Butler, MN ;

Evans, HC ;

Lee, HW ;

Leslie, JR ;

MacArthur, JD ;

McLatchie, W ;

Mak, HB ;

Skensved, P ;

Whitton, JL ;

Alexander, TK .

PHYSICAL REVIEW C, 1996, 54 (04) :1982-1998

[9] THE SCATTERING OF ALPHA-PARTICLES FROM C-12 AND THE C-12(ALPHA,GAMMA)O-16 STELLAR REACTION-RATE [J].

PLAGA, R ;

BECKER, HW ;

REDDER, A ;

ROLFS, C ;

TRAUTVETTER, HP ;

LANGANKE, K .

NUCLEAR PHYSICS A, 1987, 465 (02) :291-316

[10] THE C-12(ALPHA,GAMMA)O-16 CROSS-SECTION AT STELLAR ENERGIES [J].

REDDER, A ;

BECKER, HW ;

ROLFS, C ;

TRAUTVETTER, HP ;

DONOGHUE, TR ;

RINCKEL, TC ;

HAMMER, JW ;

LANGANKE, K .

NUCLEAR PHYSICS A, 1987, 462 (02) :385-412

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