Mass Measurements of the Neutron-Deficient Ti41, Cr45, Fe49, and Ni53 Nuclides: First Test of the Isobaric Multiplet Mass Equation in fp-Shell Nuclei

Y. H. Zhang et al.
Phys. Rev. Lett. 109, 102501 – Published 4 September 2012

Abstract

Isochronous mass spectrometry has been applied to neutron-deficient Ni58 projectile fragments at the HIRFL-CSR facility in Lanzhou, China. Masses of a series of short-lived Tz=3/2 nuclides including Ti41, Cr45, Fe49, and Ni53 have been measured with a precision of 20–40 keV. The new data enable us to test for the first time the isobaric multiplet mass equation (IMME) in fp-shell nuclei. We observe that the IMME is inconsistent with the generally accepted quadratic form for the A=53, T=3/2 quartet. We perform full space shell model calculations and compare them with the new experimental results.

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  • Received 24 April 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.102501

© 2012 American Physical Society

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Vol. 109, Iss. 10 — 7 September 2012

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