Potvrzení narušení parity v ? rozpadu 180Hfm

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F07%3A00096403" target="_blank" >RIV/61389005:_____/07:00096403 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Confirmation of parity violation in the ? decay of 180Hfm

Popis výsledku v původním jazyce

This paper reports measurements made using the technique of online nuclear orientation which reexamine the -decay of isomeric 180Hfm and specifically the 501 keV 8-?6+ transition. The irregular admixture of E2 to M2/E3 multipolarity in this transition, deduced from the forward-backward asymmetry of its angular distribution, has for decades stood as the prime evidence for parity mixing in nuclear states. The experiment, based on ion implantation of the newly developed mass-separated 180Hfm beam at the CERN online isotope mass separator (ISOLDE) facility into an iron foil maintained at millikelvin temperatures, produces higher degrees of polarization than were achieved in previous studies of this system. The value found for the E2/M2 mixing ratio, = -0.0324(16)(19), is in close agreement with the previous published average value = -0.030(2), in full confirmation of the presence of the irregular E2 admixture inthe 501 keV transition.

Název v anglickém jazyce

Confirmation of parity violation in the ? decay of 180Hfm

Popis výsledku anglicky

This paper reports measurements made using the technique of online nuclear orientation which reexamine the -decay of isomeric 180Hfm and specifically the 501 keV 8-?6+ transition. The irregular admixture of E2 to M2/E3 multipolarity in this transition, deduced from the forward-backward asymmetry of its angular distribution, has for decades stood as the prime evidence for parity mixing in nuclear states. The experiment, based on ion implantation of the newly developed mass-separated 180Hfm beam at the CERN online isotope mass separator (ISOLDE) facility into an iron foil maintained at millikelvin temperatures, produces higher degrees of polarization than were achieved in previous studies of this system. The value found for the E2/M2 mixing ratio, = -0.0324(16)(19), is in close agreement with the previous published average value = -0.030(2), in full confirmation of the presence of the irregular E2 admixture inthe 501 keV transition.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2007

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review. C

ISSN

0556-2813

e-ISSN

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Svazek periodika

76

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

1

Strana od-do

025502-025502

Kód UT WoS článku

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EID výsledku v databázi Scopus

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