Cluster structure in 40Ca via the α-transfer reaction

doi:10.1016/0375-9474(94)90019-1

Nuclear Physics A

Volume 573, Issue 1, 6 June 1994, Pages 154-172

https://doi.org/10.1016/0375-9474(94)90019-1 Get rights and content

Abstract

About seventy levels up to E_x = 15 MeV in ⁴⁰Ca have been studied via the (⁶Li, d) reaction at E = 50 MeV. The members of the K^π = 0⁻ band of a counterpart to the first K^π = 0⁺ band in the parity doublet bands were observed, in some fragments, from the 1⁻ state at 8 MeV to the 7⁻ state at 12.65 MeV in excitation energy. The J^π = 8⁺ state was found at 10.34 Me V, and the 6.93 MeV level was confirmed as a J^π = 6⁺ state. These states are considered as the members of the K^π = 0⁺ band starting from the 0⁺ state at E_x = 3.35 MeV. The 0⁺, 2⁺, 4⁺ and 6⁺ members of a higher nodal K^π = 0⁺ band with N= 14 were observed for the first time in the fp-shell nuclei. This band consists of the strongly populated states in an excitation energy region from the 0⁺ state at 11 MeV to the 6⁺ state at 15 MeV. The spectroscopic factors suggested the much stronger α-cluster character.

References (28)

T. Yamaya et al.
Phys. Rev.
(1990)
H. Horiuchi et al.
Prog. Theor. Phys.
(1968)
G. Reidemeister et al.
Phys. Rev.
(1990)
S. Ohkubo et al.
Prog. Theor. Phys.
(1988)
W.J. Gerace et al.
Nucl. Phys.
(1967)
J.J. Simpson et al.
Phys. Rev. Lett.
(1975)
R.R. Betts et al.
Nucl. Phys.
(1977)
Y. Suzuki
Prog. Theor. Phys.
(1976)
Y. Suzuki
Prog. Theor. Phys.
(1976)
W.J. Gerace et al.
Nucl. Phys.
(1968)
W.J. Gerace et al.
Nucl. Phys.
(1969)
R. Middleton et al.
Phys. Lett.
(1972)

K.F. Pal et al.

Phys. Lett.

(1980)

A.C. Merchant

Phys. Rev.

(1988)

H.T. Fortune et al.

Phys. Rev.

(1979)

T. Yamaya et al.

Phys. Rev.

(1993)

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¹: Permanent address: Department of Applied Science, Kochi Women's University, Kochi 780, Japan.

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Cluster structure in 40Ca via the α-transfer reaction

Abstract

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Prog. Theor. Phys.

Phys. Rev.

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Cluster structure in ⁴⁰Ca via the α-transfer reaction