Recoil separator ERNA: Measurement of 3He(α, γ)7Be

被引：21

作者：

Di Leva, A. ^{[1
,2
]}

De Cesare, M. ^{[1
,2
]}

Schuermann, D. ^{[1
]}

De Cesare, N. ^{[2
,5
]}

D'Onofrio, A. ^{[2
,4
]}

Gialanella, L. ^{[2
]}

Kunz, R. ^{[1
]}

Imbriani, G. ^{[2
,3
]}

Ordine, A. ^{[2
]}

Roca, V. ^{[2
,3
]}

Rogalla, D. ^{[1
]}

Rolfs, C. ^{[1
]}

Romano, M. ^{[2
,3
]}

Somorjai, E. ^{[6
]}

Strieder, F. ^{[1
]}

Terrasi, F. ^{[2
,4
]}

机构：

[1] Ruhr Univ Bochum, Inst Expt Phys 3, D-4630 Bochum, Germany

[2] Ist Nazl Fis Nucl, Sez Napoli, I-80125 Naples, Italy

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

[4] Seconda Univ Napoli, Dipartimento Sci Ambientali, Caserta, Italy

[5] Seconda Univ Napoli, Dipartimento Sci Vita, Caserta, Italy

[6] ATOMKI, Debrecen, Hungary

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2008年 / 595卷 / 02期

基金：

匈牙利科学研究基金会;

关键词：

Recoil separator; Charged particle detectors; gamma-Ray detectors; Gas target;

D O I：

10.1016/j.nima.2008.07.082

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The reaction He-3(alpha, gamma)Be-7 plays a key role for the understanding of the production of Li-7 in Big Bang nucleosynthesis as well as for the high energy component of the solar neutrino spectrum. The uncertainty in its absolute cross-section arises from systematic differences of the available data sets. In various experiments the cross-section was measured by the detection of the prompt gamma-rays or by the off-line observation of the gamma-rays following the Be-7 electron capture; in a few cases both observations were carried out. We report on a new approach based on the use of the recoil separator ERNA (European Recoil separator for Nuclear Astrophysics) to detect directly the Be-7 recoils as well as the prompt gamma-rays in coincidence with the recoils. We present technical details of the experimental setup, such as a recirculating He-3 gas target, a TOF-E end detector, and a Nal detector array. In addition, the measurement of the separator acceptance is discussed and compared to the expected recoil emittance. The feasibility of the approach is demonstrated by sample spectra, indicating cross-section determinations of He-3(alpha, beta)Be-7 in the energy range E-cm = 0.7-3.3 MeV with high precision and accuracy. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：381 / 390

页数：10

共 50 条

[1] Measurement of 3He(α,γ)7Be with ERNA recoil separator
Di Leva, A.
Gialanella, L.
Schuemann, D.
Strieder, F.
Rogalla, D.
De Cesare, M.
De Cesare, N.
D'Onofrio, A.
Fulop, Z.
Gyurky, G.
Imbriani, G.
Kunz, R.
Lubritto, C.
Ordine, A.
Roca, V.
Rolfs, C.
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