The E1 capture amplitude in 12C (α,γ0)16O

被引：51

作者：

Gialanella, L

Rogalla, D

Strieder, F

Theis, S

Gyürki, G

Agodi, C

Alba, R

Aliotta, M

Campajola, L

Del Zoppo, A

D'Onofrio, A

Figuera, P

Greife, U

Imbriani, G

Ordine, A

Roca, V

Rolfs, C

Romano, M

Sabbarese, C

Sapienza, P

Schümann, F

Somorjai, E

Terrasi, F

Trautvetter, HP

机构：

[1] Ruhr Univ Bochum, Inst Phys Ionenstrahlen, D-4630 Bochum, Germany

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

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

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

[5] Ist Nazl Fis Nucl, Lab Nazl Sud, Catania, Italy

[6] Atomki, Debrecen, Hungary

来源：

EUROPEAN PHYSICAL JOURNAL A | 2001年 / 11卷 / 03期

关键词：

D O I：

10.1007/s100500170075

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：

An excitation function of the ground-state gamma (0)-ray capture transition in C-12(alpha, gamma)O-16 at theta (gamma) = 90 degrees was obtained in far geometry using six Ge detectors, where the study of the reaction was initiated in inverse kinematics involving a windowless gas target. The detectors observed predominantly the El capture amplitude. The data at E = 1.32 to 2.99 MeV lead to an extrapolated astrophysical S factor S-E1(E-0) = 90 +/- 15 keV b at E-0 = 0.3 MeV (for the case of constructive interference between the two lowest E1 sources), in good agreement with previous works. However, a novel Monte Carlo approach in the data extrapolation reveals systematic differences between the various data sets such that a combined analysis of all available data sets could produce a biased estimate of the S-E1(E-0) value. As a consequence, the case of destructive interference between the two lowest E1 sources with S-E1(E-0) = 8 +/- 3 keV b cannot be ruled out rigorously.

引用

页码：357 / 370

页数：14