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Gamma spectroscopy for examination of light Ba isotopes after beta decay; Gammaspektroskopische Untersuchung von leichten Ba-Isotopen nach Betazerfall

Thesis/Dissertation:

Abstract

The low-spin states of the nuclei {sup 126}Ba, {sup 128}Ba, and {sup 130}Ba were observed in two {beta}-decay experiments, both carried out with the OSIRIS cube, at the Cologne FN tandem accelerator. Both measurements are based on a cyclic measuring method. Lanthanum parent nuclei are created in an `activation phase`, and the gamma radiation of the barium daughter nuclei is measured after {beta}-decay in a subsequent `measuring phase`, with the accelerator beam shut off. One significant result of both measurements is that the K=0 band could be identified for the first time in the nuclei studied. The spin could be determined in the {sup 130}Ba nucleus by an evaluation of the {gamma}{gamma}-correlation data. As for the nuclei {sup 126}Ba and {sup 128}Ba, data in support of the spin hypothesis were found in the type of the occupying, or de-occupying, {gamma}-transitions and in the predictions of the IBA-1 model. (orig./DG) [Deutsch] Die Niedrigspinzustaende der Kerne {sup 126}Ba, {sup 128}Ba und {sup 130}Ba wurden in zwei {beta}-Zerfallsexperimenten untersucht, die jeweils mit dem Osiris-Wuerfel am Koelner FN-Tandem Beschleuniger durchgefuehrt worden sind. Beide Messungen beruhen auf einem zyklischen Messverfahren, bei dem Lanthan-Mutterkerne in einer `Aktivierungsphase` erzeugt werden und in einer nachfolgenden `Messphase` bei abgeschaltetem  More>>
Authors:
Publication Date:
May 06, 1993
Product Type:
Thesis/Dissertation
Report Number:
INIS-mf-15060
Reference Number:
SCA: 663210; 663560; PA: DEN-95:0F1264; EDB-95:025932; SN: 95001322046
Resource Relation:
Other Information: TH: Diss. (Dr.rer.nat.); PBD: 6 May 1993
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BARIUM 126; BETA DECAY; BARIUM 128; BARIUM 130; BETA DECAY RADIOISOTOPES; GAMMA SPECTROSCOPY; SPIN; INTERACTING BOSON MODEL; 663210; 663560; GROUND-STATE RADIOACTIVITY; A = 90-149
OSTI ID:
10110270
Research Organizations:
Koeln Univ. (Germany). Mathematisch-Naturwissenschaftliche Fakultaet
Country of Origin:
Germany
Language:
German
Other Identifying Numbers:
Other: ON: DE95738901; TRN: DE95F1264
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
DEN
Size:
92 p.
Announcement Date:
Jun 30, 2005

Thesis/Dissertation:

Citation Formats

Siems, G. Gamma spectroscopy for examination of light Ba isotopes after beta decay; Gammaspektroskopische Untersuchung von leichten Ba-Isotopen nach Betazerfall. Germany: N. p., 1993. Web.
Siems, G. Gamma spectroscopy for examination of light Ba isotopes after beta decay; Gammaspektroskopische Untersuchung von leichten Ba-Isotopen nach Betazerfall. Germany.
Siems, G. 1993. "Gamma spectroscopy for examination of light Ba isotopes after beta decay; Gammaspektroskopische Untersuchung von leichten Ba-Isotopen nach Betazerfall." Germany.
@misc{etde_10110270,
title = {Gamma spectroscopy for examination of light Ba isotopes after beta decay; Gammaspektroskopische Untersuchung von leichten Ba-Isotopen nach Betazerfall}
author = {Siems, G}
abstractNote = {The low-spin states of the nuclei {sup 126}Ba, {sup 128}Ba, and {sup 130}Ba were observed in two {beta}-decay experiments, both carried out with the OSIRIS cube, at the Cologne FN tandem accelerator. Both measurements are based on a cyclic measuring method. Lanthanum parent nuclei are created in an `activation phase`, and the gamma radiation of the barium daughter nuclei is measured after {beta}-decay in a subsequent `measuring phase`, with the accelerator beam shut off. One significant result of both measurements is that the K=0 band could be identified for the first time in the nuclei studied. The spin could be determined in the {sup 130}Ba nucleus by an evaluation of the {gamma}{gamma}-correlation data. As for the nuclei {sup 126}Ba and {sup 128}Ba, data in support of the spin hypothesis were found in the type of the occupying, or de-occupying, {gamma}-transitions and in the predictions of the IBA-1 model. (orig./DG) [Deutsch] Die Niedrigspinzustaende der Kerne {sup 126}Ba, {sup 128}Ba und {sup 130}Ba wurden in zwei {beta}-Zerfallsexperimenten untersucht, die jeweils mit dem Osiris-Wuerfel am Koelner FN-Tandem Beschleuniger durchgefuehrt worden sind. Beide Messungen beruhen auf einem zyklischen Messverfahren, bei dem Lanthan-Mutterkerne in einer `Aktivierungsphase` erzeugt werden und in einer nachfolgenden `Messphase` bei abgeschaltetem Beschleunigerstrahl die nach dem {beta}-Zerfall folgende {gamma}-Strahlung der Barium-Tochterkerne gemessen wird. Ein wichtiges Ergebnis beider Messungen ist die erstmalige Identifizierung der K=0-Bande in den hier untersuchten Kernen. Die Spinbestimmung war bei dem Kern {sup 130}Ba ueber die Auswertung der {gamma}{gamma}-Korrelationsdaten moeglich. Die Spinhypothese wird im Fall von {sup 126}Ba und {sup 128}Ba durch die Art der be- bzw. entvoelkernden {gamma}-Uebergaenge sowie den Vorhersagen des IBA-1-Modells unterstuetzt. (orig./DG)}
place = {Germany}
year = {1993}
month = {May}
}