Structure of 24Al for the stellar reaction rate of 23Mg(p,γ)24Al

S. Kubono; T. Kajino; S. Kato

doi:10.1016/0375-9474(95)00043-Z

Structure of ²⁴Al for the stellar reaction rate of ²³Mg(p,γ)²⁴Al

S. Kubono^*
, T. Kajino
, S. Kato

^*Corresponding author for this work

The University of Tokyo
National Astronomical Observatory of Japan
Yamagata University

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

The nuclear levels of ²⁴Al were studied by the ²⁴Mg(³He,t)²⁴Al reaction at 60 MeV. Several new states were identified including a level at 2.787 MeV just above the proton threshold in ²⁴Al, and considerable level shifts were observed for most levels around the threshold. The spin-parity assignments were also made for many states including the threshold states by the angular distribution measurement. This clarifies the spin-parity and the excitation energy of the critical levels assumed before for the stellar reaction rate calculation of ²³Mg(p,γ)²⁴Al. A large increase of the reaction rate is predicted, based on the present experimental result, at the temperature region of T₉ = 0.2-0.8 which would be crucial for the break-out process of the NeNa cycle to the MgAl cycle. This result suggests that the onset temperature of ²³Mg(p,γ)²⁴Al should be lowered roughly by 10%. Application of the (³He,t) reaction at 60 MeV for spin assignment is also discussed.

Original language	English
Pages (from-to)	521-536
Number of pages	16
Journal	Nuclear Physics A
Volume	588
Issue number	2
DOIs	https://doi.org/10.1016/0375-9474(95)00043-Z
State	Published - 5 Jun 1995
Externally published	Yes

Keywords

Al deduced levels, J, π. Deduced the onset temperature, stellar reaction rate of Mg(p,γ)Al
NUCLEAR REACTION Mg(He,t), E = 59.57 MeV
measured σ(θ)

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10.1016/0375-9474(95)00043-Z

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@article{230d904b0a7a446280560542b30558a9,

title = "Structure of 24Al for the stellar reaction rate of 23Mg(p,γ)24Al",

abstract = "The nuclear levels of 24Al were studied by the 24Mg(3He,t)24Al reaction at 60 MeV. Several new states were identified including a level at 2.787 MeV just above the proton threshold in 24Al, and considerable level shifts were observed for most levels around the threshold. The spin-parity assignments were also made for many states including the threshold states by the angular distribution measurement. This clarifies the spin-parity and the excitation energy of the critical levels assumed before for the stellar reaction rate calculation of 23Mg(p,γ)24Al. A large increase of the reaction rate is predicted, based on the present experimental result, at the temperature region of T9 = 0.2-0.8 which would be crucial for the break-out process of the NeNa cycle to the MgAl cycle. This result suggests that the onset temperature of 23Mg(p,γ)24Al should be lowered roughly by 10\%. Application of the (3He,t) reaction at 60 MeV for spin assignment is also discussed.",

keywords = "Al deduced levels, J, π. Deduced the onset temperature, stellar reaction rate of Mg(p,γ)Al, NUCLEAR REACTION Mg(He,t), E = 59.57 MeV, measured σ(θ)",

author = "S. Kubono and T. Kajino and S. Kato",

year = "1995",

month = jun,

day = "5",

doi = "10.1016/0375-9474(95)00043-Z",

language = "英语",

volume = "588",

pages = "521--536",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier B.V.",

number = "2",

}

TY - JOUR

T1 - Structure of 24Al for the stellar reaction rate of 23Mg(p,γ)24Al

AU - Kubono, S.

AU - Kajino, T.

AU - Kato, S.

PY - 1995/6/5

Y1 - 1995/6/5

N2 - The nuclear levels of 24Al were studied by the 24Mg(3He,t)24Al reaction at 60 MeV. Several new states were identified including a level at 2.787 MeV just above the proton threshold in 24Al, and considerable level shifts were observed for most levels around the threshold. The spin-parity assignments were also made for many states including the threshold states by the angular distribution measurement. This clarifies the spin-parity and the excitation energy of the critical levels assumed before for the stellar reaction rate calculation of 23Mg(p,γ)24Al. A large increase of the reaction rate is predicted, based on the present experimental result, at the temperature region of T9 = 0.2-0.8 which would be crucial for the break-out process of the NeNa cycle to the MgAl cycle. This result suggests that the onset temperature of 23Mg(p,γ)24Al should be lowered roughly by 10%. Application of the (3He,t) reaction at 60 MeV for spin assignment is also discussed.

AB - The nuclear levels of 24Al were studied by the 24Mg(3He,t)24Al reaction at 60 MeV. Several new states were identified including a level at 2.787 MeV just above the proton threshold in 24Al, and considerable level shifts were observed for most levels around the threshold. The spin-parity assignments were also made for many states including the threshold states by the angular distribution measurement. This clarifies the spin-parity and the excitation energy of the critical levels assumed before for the stellar reaction rate calculation of 23Mg(p,γ)24Al. A large increase of the reaction rate is predicted, based on the present experimental result, at the temperature region of T9 = 0.2-0.8 which would be crucial for the break-out process of the NeNa cycle to the MgAl cycle. This result suggests that the onset temperature of 23Mg(p,γ)24Al should be lowered roughly by 10%. Application of the (3He,t) reaction at 60 MeV for spin assignment is also discussed.

KW - Al deduced levels, J, π. Deduced the onset temperature, stellar reaction rate of Mg(p,γ)Al

KW - NUCLEAR REACTION Mg(He,t), E = 59.57 MeV

KW - measured σ(θ)

UR - https://www.scopus.com/pages/publications/0001596804

U2 - 10.1016/0375-9474(95)00043-Z

DO - 10.1016/0375-9474(95)00043-Z

M3 - 文章

AN - SCOPUS:0001596804

SN - 0375-9474

VL - 588

SP - 521

EP - 536

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 2

ER -

Structure of ²⁴Al for the stellar reaction rate of ²³Mg(p,γ)²⁴Al

Abstract

Keywords

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