Improved Direct Measurement of the 64.5 keV Resonance Strength in the 17O(p,α)14N Reaction at LUNA

被引：54

作者：

Bruno, C. G. ^{[1
]}

Scott, D. A. ^{[1
]}

Aliotta, M. ^{[1
]}

Formicola, A. ^{[2
]}

Best, A. ^{[3
,4
]}

Boeltzig, A. ^{[5
]}

Bemmerer, D. ^{[6
]}

Broggini, C. ^{[7
]}

Caciolli, A. ^{[7
,8
]}

Cavanna, F. ^{[9
,10
]}

Ciani, G. F. ^{[5
]}

Corvisiero, P. ^{[9
,10
]}

Davinson, T. ^{[1
]}

Depalo, R. ^{[7
,8
]}

Di Leva, A. ^{[3
,4
]}

Elekes, Z. ^{[11
]}

Ferraro, F. ^{[9
,10
]}

Fulop, Zs. ^{[11
]}

Gervino, G. ^{[12
,13
]}

Guglielmetti, A. ^{[14
,15
]}

Gustavino, C. ^{[16
]}

Gyurky, Gy. ^{[11
]}

Imbriani, G. ^{[3
,4
]}

Junker, M. ^{[2
]}

Menegazzo, R. ^{[7
]}

Mossa, V. ^{[17
,18
]}

Pantaleo, F. R. ^{[17
,18
]}

Piatti, D. ^{[7
,8
]}

Prati, P. ^{[9
,10
]}

Somorjai, E. ^{[11
]}

Straniero, O. ^{[19
]}

Strieder, F. ^{[20
]}

Szuecs, T. ^{[6
]}

Takacs, M. P. ^{[6
,20
]}

Trezzi, D. ^{[14
,15
]}

机构：

[1] Univ Edinburgh, Sch Phys & Astron, SUPA, Edinburgh EH9 3FD, Midlothian, Scotland

[2] Ist Nazl Fis Nucl, LNGS, I-67100 Assergi, Italy

[3] Univ Napoli Federico II, I-80126 Naples, Italy

[4] Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy

[5] Gran Sasso Sci Inst, Ist Nazl Fis Nucl, Viale F Crispi 7, I-67100 Laquila, Italy

[6] Helmholtz Zentrum Dresden Rossendorf, Bautzner Landstr 400, D-01328 Dresden, Germany

[7] Ist Nazl Fis Nucl, Sez Padova, Via F Marzolo 8, I-35131 Padua, Italy

[8] Univ Padua, Via F Marzolo 8, I-35131 Padua, Italy

[9] Univ Genoa, Via Dodecaneso 33, I-16146 Genoa, Italy

[10] Ist Nazl Fis Nucl, Sez Genova, Via Dodecaneso 33, I-16146 Genoa, Italy

[11] Inst Nucl Res MTA ATOMKI, POB 51, HU-4001 Debrecen, Hungary

[12] Univ Turin, Via P Giuria 1, I-10125 Turin, Italy

[13] Ist Nazl Fis Nucl, Sez Torino, Via P Giuria 1, I-10125 Turin, Italy

[14] Univ Milan, Via G Celoria 16, I-20133 Milan, Italy

[15] Ist Nazl Fis Nucl, Sez Milano, Via G Celoria 16, I-20133 Milan, Italy

[16] Ist Nazl Fis Nucl, Sez Roma La Sapienza, Piazzale A Moro 2, I-00185 Rome, Italy

[17] Univ Bari, I-70125 Bari, Italy

[18] Ist Nazl Fis Nucl, Sez Bari, I-70125 Bari, Italy

[19] Osservatorio Astron Collurania, Teramo, Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy

[20] South Dakota Sch Mines, 501 E St Joseph St, Rapid City, SD 57701 USA

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 117卷 / 14期

基金：

英国科学技术设施理事会;

关键词：

REACTION-RATES; CNO ISOTOPES; RED GIANTS; GRAPHS; TABLES;

D O I：

10.1103/PhysRevLett.117.142502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The O-17(p,alpha)N-14 reaction plays a key role in various astrophysical scenarios, from asymptotic giant branch stars to classical novae. It affects the synthesis of rare isotopes such as O-17 and F-18, which can provide constraints on astrophysical models. A new direct determination of the E-R = 64.5 keV resonance strength performed at the Laboratory for Underground Nuclear Astrophysics (LUNA) accelerator has led to the most accurate value to date omega gamma = 10.0 +/- 1.4(stat) +/- 0.7(syst) neV, thanks to a significant background reduction underground and generally improved experimental conditions. The (bare) proton partial width of the corresponding state at E-x = 5672 keV in F-18 is Gamma(p) = 35 +/- 5(stat) +/- 3(syst) neV. This width is about a factor of 2 higher than previously estimated, thus leading to a factor of 2 increase in the O-17(p,alpha)N-14 reaction rate at astrophysical temperatures relevant to shell hydrogen burning in red giant and asymptotic giant branch stars. The new rate implies lower O-17/O-16 ratios, with important implications on the interpretation of astrophysical observables from these stars.

引用

页数：6

共 50 条

[31] 14N(α,p)17O nuclear reaction cross-section at 4.9-6.1 MeV
Della Mea, G
Patelli, A
Restello, S
Rigato, V
Vomiero, A
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2005, 240 (04): : 803 - 809
[32] 53Cr, 17O and 14N nuclear quadrupole resonance in ammonium dichromate
David Stephenson
Nadia Singh
Hyperfine Interactions, 2016, 237
[33] Theoretical 14N and 17O nuclear quadrupole resonance parameters for tirapazamine and related metabolites
Mostafa Talebi Tari
Neda Ahmadinejad
Structural Chemistry, 2014, 25 : 1281 - 1287
[34] 53Cr, 17O and 14N nuclear quadrupole resonance in ammonium dichromate
Stephenson, David
Singh, Nadia
HYPERFINE INTERACTIONS, 2016, 237
[35] Theoretical 14N and 17O nuclear quadrupole resonance parameters for tirapazamine and related metabolites
Tari, Mostafa Talebi
Ahmadinejad, Neda
STRUCTURAL CHEMISTRY, 2014, 25 (04) : 1281 - 1287
[36] Precision Measurements of the 278 keV 14N(p,γ) and the 151 keV 18O(p,α) Resonance Parameters
Borowski, M.
Lieb, K. P.
Uhrmacher, M.
Bolse, W.
CAPTURE GAMMA-RAY SPECTROSCOPY AND RELATED TOPICS, 2009, 1090 : 450 - +
[37] Cross-section measurement for the 17O(n,p)17N reaction by 14-MeV neutrons
Kasugai, Y
Ikeda, Y
Sakane, H
NUCLEAR SCIENCE AND ENGINEERING, 2000, 136 (02) : 258 - 264
[38] The AGB star nucleosynthesis in the light of the recent 17O(p,α)14N and 18O(p,α)15N reaction rate determinations
Palmerini, S.
Sergi, M. L.
La Cognata, M.
Lamia, L.
Pizzone, R. G.
Spitaleri, C.
EXOTIC NUCLEI AND NUCLEAR/PARTICLE ASTROPHYSICS (V). FROM NUCLEI TO STARS, 2015, 1645 : 377 - 381
[39] The Measurement of 16O(n,γ)17O Reaction at the Pygmy Resonance Region
Huang Zheng-de Zhu Li-hua Hou Long Ding Da-zhao (China Institute of Atomic Energy
Chinese Journal of Nuclear Physics, 1994, (03) : 270 - 274
[40] Search for a resonance in the 14N(p,γ)15O reaction at Ep=127 keV -: art. no. 022801
Runkle, RC
Champagne, AE
Fox, C
Iliadis, C
Pollanen, J
Stephan, A
Westerfeldt, C
PHYSICAL REVIEW C, 2002, 66 (02)

← 1 2 3 4 5 →