High-precision mass measurements of nickel, copper, and gallium isotopes and the purported shell closure atN=40 | Zendy

C. Guénaut | Zendy; G. Audi | Zendy; D. Beck | Zendy; K. Blaum | Zendy; G. Bollen | Zendy; P. Delahaye | Zendy; F. Herfurth | Zendy; A. Kellerbauer | Zendy; H.J. Kluge | Zendy; J. Libert | Zendy; D. Lunney | Zendy; S. Schwarz | Zendy; L. Schweikhard | Zendy; C. Yazidjian | Zendy

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High-precision mass measurements of nickel, copper, and gallium isotopes and the purported shell closure atN=40

Author(s) -

C. Guénaut,

G. Audi,

D. Beck,

K. Blaum,

G. Bollen,

P. Delahaye,

F. Herfurth,

A. Kellerbauer,

H.J. Kluge,

J. Libert,

D. Lunney,

S. Schwarz,

L. Schweikhard,

C. Yazidjian

Publication year - 2007

Publication title -

physical review c

Language(s) - English

Resource type - Journals

eISSN - 1089-490X

pISSN - 0556-2813

DOI - 10.1103/physrevc.75.044303

Subject(s) - nuclide , physics , closure (psychology) , isotope , shell (structure) , neutron , copper , mass spectrometry , analytical chemistry (journal) , atomic physics , nuclear physics , crystallography , chemistry , materials science , chromatography , quantum mechanics , composite material , organic chemistry , economics , market economy

14 figures - PTHHigh-precision mass measurements of more than thirty neutron-rich nuclides around the Z=28 closed proton shell were performed with the triple-trap mass spectrometer ISOLTRAP at ISOLDE/CERN to address the question of a possible neutron shell closure at N=40. The results, for 57,60,64-69Ni (Z=28), 65-74,76Cu (Z=29), and 63-65,68-78Ga (Z=31), have a relative uncertainty of the order of 10^8. In particular, the masses of 72-74,76Cu have been measured for the first time. We analyse the resulting mass surface for signs of magicity, comparing the behavior of N=40 to that of known magic numbers and to mid-shell behavior. Contrary to nuclear spectroscopy studies, no indications of a shell or sub-shell closure are found for N=40

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