Beta-delayed proton precursors with 59≦Z≦62

P. A. Wilmarth; J. M. Nitschke; P. K. Lemmertz; R. B. Firestone

doi:10.1007/BF01411963

Beta-delayed proton precursors with 59≦Z≦62

P. A. Wilmarth, J. M. Nitschke, P. K. Lemmertz, R. B. Firestone

Research output: Contribution to journal › Article › peer-review

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Abstract

The new, beta-delayed proton emitters¹²⁸Pr(3.2_-0.4^+0.5 s),¹³⁰Pm(2.2_-0.4^+0.6 s), and¹³²Pm(5.0_-0.6^+0.8 s) have been observed at the on-line isotope separator OASIS. Also studied were¹²⁹Nd and¹³³Sm. Our on-going study of the decay properties of very neutron-deficient lanthanides has led to detailed information about beta-delayed proton emitters with 59≤Z≤62. The isotopes were produced at the SuperHILAC's on-line isotope separator OASIS [1] in reactions of⁴⁰Ca projectiles on⁹²Mo and⁹⁶Ru targets enriched to >95%. Decay studies were carried out in a low background spectroscopy laboratory. The isotope of interest was passed through a slit in the focal plane of the mass separator, transported ionoptically to a fast cycling tape, and periodically positioned between a silicon charged particle telescope, a HPGe x-ray detector, and a GAMMA-X Ge detector. Decays involving beta-delayed gamma rays and protons along with any coincident positrons, x-rays and gamma rays were measured event-by-event and written to computer tape for subsequent replay and analysis.

Original language	English (US)
Pages (from-to)	179-180
Number of pages	2
Journal	Zeitschrift für Physik A Atoms and Nuclei
Volume	321
Issue number	1
DOIs	https://doi.org/10.1007/BF01411963
State	Published - Mar 1985
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1007/BF01411963

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title = "Beta-delayed proton precursors with 59≦Z≦62",

abstract = "The new, beta-delayed proton emitters128Pr(3.2-0.4+0.5 s),130Pm(2.2-0.4+0.6 s), and132Pm(5.0-0.6+0.8 s) have been observed at the on-line isotope separator OASIS. Also studied were129Nd and133Sm. Our on-going study of the decay properties of very neutron-deficient lanthanides has led to detailed information about beta-delayed proton emitters with 59≤Z≤62. The isotopes were produced at the SuperHILAC's on-line isotope separator OASIS [1] in reactions of40Ca projectiles on92Mo and96Ru targets enriched to >95%. Decay studies were carried out in a low background spectroscopy laboratory. The isotope of interest was passed through a slit in the focal plane of the mass separator, transported ionoptically to a fast cycling tape, and periodically positioned between a silicon charged particle telescope, a HPGe x-ray detector, and a GAMMA-X Ge detector. Decays involving beta-delayed gamma rays and protons along with any coincident positrons, x-rays and gamma rays were measured event-by-event and written to computer tape for subsequent replay and analysis.",

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year = "1985",

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AU - Lemmertz, P. K.

AU - Firestone, R. B.

PY - 1985/3

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Beta-delayed proton precursors with 59≦Z≦62

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