Direct mass measurements of proton-rich isotopes of Ge, As, Se, and Br

G. F. Lima; A. Lépine-Szily; G. Audi; W. Mittig; M. Chartier; N. A. Orr; R. Lichtenthaler; J. C. Angelique; J. M. Casandjian; A. Cunsolo; C. Donzaud; A. Foti; A. Gillibert; M. Lewitowicz; S. Lukyanov; M. MacCormick; D. J. Morrissey; A. N. Ostrowski; B. M. Sherrill; C. Stephan; T. Suomijarvi; L. Tassan-Got; D. J. Vieira; A. C. C. Villari; J. M. Wouters

doi:10.1103/PhysRevC.65.044618

Direct mass measurements of proton-rich isotopes of Ge, As, Se, and Br

G. F. Lima, A. Lépine-Szily, G. Audi, W. Mittig, M. Chartier, N. A. Orr, R. Lichtenthaler, J. C. Angelique, J. M. Casandjian, A. Cunsolo, C. Donzaud, A. Foti, A. Gillibert, M. Lewitowicz, S. Lukyanov, M. MacCormick, D. J. Morrissey, A. N. Ostrowski, B. M. Sherrill, C. Stephan, T. Suomijarvi, L. Tassan-Got, D. J. Vieira, A. C. C. Villari, and J. M. Wouters

Phys. Rev. C 65, 044618 – Published 3 April 2002

Abstract

The masses of neutron-deficient nuclei close to the proton drip line are an important input for the rapid proton-capture process modeling above $^{56} Ni .$ The measurement of the masses of proton-rich nuclei with $32 <~ Z <~ 35$ has been made using a direct time-of-flight technique. The masses of the nuclides $^{66} As,^{68} Se,$ and $^{71} Br$ are reported for the first time, with mass excesses of $- 51 500 (680),$ $- 53 620 (1000),$ and $- 57 060 (570) keV$ being found. The masses agree well in most cases with the Audi-Wapstra systematics.

Received 30 November 2001

DOI:https://doi.org/10.1103/PhysRevC.65.044618

Authors & Affiliations

G. F. Lima^1,2, A. Lépine-Szily¹, G. Audi³, W. Mittig⁴, M. Chartier^4,5,*, N. A. Orr⁶, R. Lichtenthaler¹, J. C. Angelique², J. M. Casandjian⁴, A. Cunsolo⁷, C. Donzaud⁸, A. Foti⁷, A. Gillibert⁹, M. Lewitowicz⁴, S. Lukyanov¹⁰, M. MacCormick⁸, D. J. Morrissey¹¹, A. N. Ostrowski^3,12, B. M. Sherrill¹¹, C. Stephan⁸, T. Suomijarvi⁸, L. Tassan-Got⁸, D. J. Vieira¹³, A. C. C. Villari³, and J. M. Wouters¹³

¹Instituto de Física-Universidade de São Paulo, C.P.66318, 05315-970 São Paulo, Brazil
²FACENS, Faculdade de Engenharia de Sorocaba, Sorocaba, Brazil
³CSNSM (IN2P3-CNRS&UPS), Bâtiment 108, F-91405 Orsay Campus, France
⁴GANIL, Boulevard Henry Becquerel, BP 5027, F-14021 Caen Cedex, France
⁵University of Liverpool, Department of Physics, Liverpool L69 7ZE, United Kingdom
⁶LPC, IN2P3-CNRS, ISMRA et Université de Caen, F-14050 Caen Cedex, France
⁷INFN, Corso Itália 57, I-95129 Catania, Italy
⁸IPN Orsay, BP1, F-91406 Orsay Cedex, France
⁹CEA/DSM/DAPNIA/SPhN, CEN Saclay, F-91191 Gif-sur-Yvette, France
¹⁰LNR, JINR, Dubna, P.O. Box 79, RU-101000 Moscow, Russia
¹¹NSCL, Michigan State University, East Lansing, Michigan 48824-1321
¹²Department of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
¹³Los Alamos National Laboratory, Los Alamos, New Mexico 87545

^*On leave from CENBG, Université de Bordeaux, Le Haut Vigneau, BP120, F-33175 Gradignan, France.

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Vol. 65, Iss. 4 — April 2002

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