Transition probabilities between intruder states in heavy Ag isotopes

Fogelberg, B.; Lund, Eva; Zongyuan, Ye; Ekstrom, Brenda L.

doi:10.1063/1.36994

AIP Conference Proceedings

1987

DOI: 10.1063/1.36994

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Transition probabilities between intruder states in heavy Ag isotopes

B. Fogelberg¹,

Eva Lund²,

Ye Zongyuan³

et al.

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β - and γ -spectroscopy study of Pd119 and Ag
Kurpeta
¹
,
Abramuk
²
,
Rza̧ca‐Urban
³

et al. 2022
Phys. Rev. C
4
0
1
0
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Neutron-rich 119 Pd nuclei were produced in fission of natural uranium, induced by 25-MeV protons. Fission fragments swiftly extracted with the Ion Guide Isotope Separation On-Line method were mass separated using a dipole magnet and a Penning trap, providing mono-isotopic samples of 119 Pd. Their β − decay was measured with γ γ -and βγ -spectroscopy methods using low-energy germanium detectors and a thin plastic scintillator. Two distinct nuclear-level structures were observed in 119 Ag, based on the 1/2 − and 7/2 + isomers reported previously. The β − -decay work was complemented by a prompt-γ study of levels in 119 Ag populated in spontaneous fission of 252 Cf, performed using the Gammasphere array of germanium detectors. Contrary to previous suggestions, our data show that the 1/2 − isomer is located below the 7/2 + isomer and is proposed as a new ground state of 119 Ag with the 7/2 + isomer excitation energy determined to be 33.4 keV. Our data indicate that there are two β unstable isomers in 119 Pd, a proposed ground state of 119 Pd with tentative spin 1/2 + or 3/2 + and a half-life of 0.88 s and the other one about 350 keV above, having spin (11/2 − ) and a half-life of 0.85 s. The higher-energy isomer probably decays to the 1/2 + or 3/2 + ground state via a γ cascade comprising 18.7-219.8-X-keV transitions. The unobserved isomeric transition with energy X ≈ 100 keV probably has an E 3 multipolarity. Its hindrance factor is significantly lower than for analogous E 3 isomeric transitions in lighter Pd isotopes, suggesting an oblate deformation of levels in 119 Pd. Oblate configurations in 119 Ag are discussed also.

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β - and γ -spectroscopy study of Pd119 and Ag
Kurpeta
¹
,
Abramuk
²
,
Rza̧ca‐Urban
³

et al. 2022
Phys. Rev. C
4
0
1
0
View full text Add to dashboard Cite

show abstract

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Transition probabilities between intruder states in heavy Ag isotopes

Cited by 1 publication

References 0 publications

β - and γ -spectroscopy study of Pd119 and Ag
Kurpeta
¹
,
Abramuk
²
,
Rza̧ca‐Urban
³

et al. 2022
Phys. Rev. C
4
0
1
0
View full text Add to dashboard Cite

β - and γ -spectroscopy study of Pd119 and Ag
Kurpeta
¹
,
Abramuk
²
,
Rza̧ca‐Urban
³

et al. 2022
Phys. Rev. C
4
0
1
0
View full text Add to dashboard Cite

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Transition probabilities between intruder states in heavy Ag isotopes

Cited by 1 publication

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β - and γ -spectroscopy study of Pd119 and AgKurpeta1, Abramuk2, Rza̧ca‐Urban3 et al. 2022Phys. Rev. C4010View full textAdd to dashboardCite

β - and γ -spectroscopy study of Pd119 and AgKurpeta1, Abramuk2, Rza̧ca‐Urban3 et al. 2022Phys. Rev. C4010View full textAdd to dashboardCite

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β - and γ -spectroscopy study of Pd119 and Ag
Kurpeta
¹
,
Abramuk
²
,
Rza̧ca‐Urban
³

et al. 2022
Phys. Rev. C
4
0
1
0
View full text Add to dashboard Cite

β - and γ -spectroscopy study of Pd119 and Ag
Kurpeta
¹
,
Abramuk
²
,
Rza̧ca‐Urban
³

et al. 2022
Phys. Rev. C
4
0
1
0
View full text Add to dashboard Cite