[sup 223]Ra levels fed in the [sup 223]Fr [beta] decay

Journal Article · Fri Jan 01 00:00:00 EST 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.47.94· OSTI ID:6898802

Abdul-Hadi, A; Barci, V; Weiss, B; Maria, H; Ardisson, G ^[1]; Hussonnois, M; Constantinescu, O ^[2]

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1. Laboratoire de Radiochimie, Universite de Nice, 06108 Nice CEDEX (France)
2. Institut de Physique Nucleaire, Boite Postale 1, 91406 Orsay CEDEX (France)

The [sup 223]Fr [beta] decay was reinvestigated using high-resolution single [gamma] spectrometry as well as [gamma]-[gamma] coincidence techniques. For single [gamma]-spectra measurements, radiochemically pure [sup 223]Fr sources were obtained by chromatographic separation from a 75 MBq activity [sup 227]Ac parent source and continuously purified of [sup 223]Ra and daughters. The analysis of the [gamma] spectra of 30 sources showed the existence of 131 [gamma] lines, of which 87 are reported for the first time in the [sup 223]Fr [beta] decay although many of them are observed following the [sup 227]Th [alpha] decay. The [sup 223]Fr half-life was remeasured and found to be [ital T][sub 1/2]=22.00[plus minus]0.07 min. [gamma]-[gamma]-[ital t] coincidence measurements were also carried out with [sup 223]Fr purified sources. The [sup 223]Ra level scheme was built on the basis of our [gamma] data, as well as [sup 227]Th [alpha]-decay data. Among the 32 excited [sup 223]Ra levels, of which 22 were also known from [sup 227]Th [alpha] decay, 13 are newly reported from [sup 223]Fr [beta] decay. Low energy levels ([ital E][lt]400 keV) may be classified as parity doublet bands according to the predictions of the reflection asymmetric rotor model. Above a 700 keV gap, a coexistence of symmetric and asymmetric shapes including both static and dynamic octupole correlations is suggested.

• OSTI ID: 6898802
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Vol. 47:1; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
FRANCIUM 223
BETA-MINUS DECAY
RADON 223
GAMMA SPECTROSCOPY
COINCIDENCE METHODS
HALF-LIFE
ALKALI METAL ISOTOPES
ALPHA DECAY RADIOISOTOPES
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COUNTING TECHNIQUES
DAYS LIVING RADIOISOTOPES
DECAY
EVEN-ODD NUCLEI
FRANCIUM ISOTOPES
HEAVY NUCLEI
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEAR DECAY
NUCLEI
ODD-EVEN NUCLEI
RADIOISOTOPES
RADON ISOTOPES
SPECTROSCOPY
YEARS LIVING RADIOISOTOPES
663210* - Ground-State Radioactivity- (1992-)
663590 - Nuclear Mass Ranges- A=220 & Above- (1992-)