Lifetimes of the 212− and 292+ states in 211At and their implication for effective charges and quadrupole moments

doi:10.1016/0375-9474(95)00170-6

Nuclear Physics A

Volume 591, Issue 1, 14 August 1995, Pages 104-116

https://doi.org/10.1016/0375-9474(95)00170-6 Get rights and content

Abstract

The lifetimes of the $212^{−}$ state (1416 keV) and the $292^{+}$ state (2641 keV) in ²¹¹At were measured to be τ_m = 50.7(10) ns and τ_m = 73.3(10) ns, respectively, using the γ-time technique. Using these lifetime measurements a value for the quadrupole moment of the $292^{+}$ state was derived. The explicit inclusion of octupole coupling effects into a description of the configuration for the $292^{+}$ level allows the extraction of an orbital independent effective charge of e_eff = 1.5e. From this a nominal value for the quadrupole moment of the πi_13/2 orbital can be deduced. New levels identified have allowed a determination of the strength of the πi_13/2−πf_7/2 residual interaction.

References (28)

A.P. Byrne et al.
Nucl. Phys. A
(1986)
H.E. Mahnke et al.
Phys. Lett. B
(1983)
I. Bergström et al.
Phys. Lett. B
(1970)
K.H. Maier et al.
Phys. Lett. B
(1971)
R. Arvieu et al.
Nucl. Phys A
(1970)
A.E. Stuchbery et al.
Nucl. Phys. A
(1988)
A.P. Byrne et al.
Nucl. Phys. A
(1986)
A.E. Stuchbery et al.
Nucl. Phys. A
(1992)
O. Häusser et al.
Nucl. Phys. A
(1976)
J.A. Becker et al.
Nucl. Phys. A
(1991)

G.D. Dracoulis et al.

Nucl. Phys A

(1987)

A.P. Byrne et al.

Nucl. Phys. A

(1990)

H. Sagawa et al.

Phys. Lett. B

(1988)

R.H. Spear et al.

Phys. Lett. B

(1983)

Cited by (0)

¹: Joint appointment with the Department of Physics and Theoretical Physics, The Faculties.

View full text