Non-yrast level structures in the isotopes 131Pr and 131La

J. Genevey; A. Gizon; C. Foin; D. Bucurescu; Gh Cǎta-Danil; B. Weiss; D. Barnéoud; T. Von Egidy; J. Gizon; C. F. Liang; P. Paris

doi:10.1016/S0375-9474(96)00390-9

Non-yrast level structures in the isotopes ¹³¹Pr and ¹³¹La

J. Genevey, A. Gizon, C. Foin, D. Bucurescu, Gh Cǎta-Danil, B. Weiss, D. Barnéoud, T. Von Egidy, J. Gizon, C. F. Liang, P. Paris

Chair of Physics I

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

5 Scopus citations

Abstract

Low-lying levels of ¹³¹Pr and ¹³¹La isotopes have been investigated by means of β/EC decays of ¹³¹Nd and ¹³¹Ce, respectively. The radioactive nuclei were produced in the ⁹⁴Mo+⁴⁰Ca reaction at a bombarding energy of 255 MeV and transported with a He-jet system. The identification and the characteristics of the ^131mPr isomer (5.7 s) were obtained by applying both He-jet techniques and on-line gamma-ray spectroscopy with mechanically pulsed beams. γγt, Xγt, e^-γt coincidence measurements as well as time multi-analysis were performed. Internal conversion electrons were recorded with a magnetic selector and multipolarities deduced. Level schemes of ¹³¹Pr and ¹³¹La are discussed and compared to those of neighboring odd-Z Pr and La isotopes using calculations made in the frame of the Interacting Boson-Fermion Model.

Original language	English
Pages (from-to)	247-269
Number of pages	23
Journal	Nuclear Physics, Section A
Volume	611
Issue number	2-3
DOIs	https://doi.org/10.1016/S0375-9474(96)00390-9
State	Published - 23 Dec 1996

Keywords

Measured Eγ, Iγ, γγ-coin, Xγ-coin, eγ-coin, internal conversion electrons, T
Radioactivity Nd,Ce(EC),(β)

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10.1016/S0375-9474(96)00390-9

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title = "Non-yrast level structures in the isotopes 131Pr and 131La",

abstract = "Low-lying levels of 131Pr and 131La isotopes have been investigated by means of β/EC decays of 131Nd and 131Ce, respectively. The radioactive nuclei were produced in the 94Mo+40Ca reaction at a bombarding energy of 255 MeV and transported with a He-jet system. The identification and the characteristics of the 131mPr isomer (5.7 s) were obtained by applying both He-jet techniques and on-line gamma-ray spectroscopy with mechanically pulsed beams. γγt, Xγt, e-γt coincidence measurements as well as time multi-analysis were performed. Internal conversion electrons were recorded with a magnetic selector and multipolarities deduced. Level schemes of 131Pr and 131La are discussed and compared to those of neighboring odd-Z Pr and La isotopes using calculations made in the frame of the Interacting Boson-Fermion Model.",

keywords = "Measured Eγ, Iγ, γγ-coin, Xγ-coin, eγ-coin, internal conversion electrons, T, Radioactivity Nd,Ce(EC),(β)",

author = "J. Genevey and A. Gizon and C. Foin and D. Bucurescu and Gh Cǎta-Danil and B. Weiss and D. Barn{\'e}oud and {Von Egidy}, T. and J. Gizon and Liang, {C. F.} and P. Paris",

year = "1996",

month = dec,

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doi = "10.1016/S0375-9474(96)00390-9",

language = "English",

volume = "611",

pages = "247--269",

journal = "Nuclear Physics, Section A",

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TY - JOUR

T1 - Non-yrast level structures in the isotopes 131Pr and 131La

AU - Genevey, J.

AU - Gizon, A.

AU - Foin, C.

AU - Bucurescu, D.

AU - Cǎta-Danil, Gh

AU - Weiss, B.

AU - Barnéoud, D.

AU - Von Egidy, T.

AU - Gizon, J.

AU - Liang, C. F.

AU - Paris, P.

PY - 1996/12/23

Y1 - 1996/12/23

N2 - Low-lying levels of 131Pr and 131La isotopes have been investigated by means of β/EC decays of 131Nd and 131Ce, respectively. The radioactive nuclei were produced in the 94Mo+40Ca reaction at a bombarding energy of 255 MeV and transported with a He-jet system. The identification and the characteristics of the 131mPr isomer (5.7 s) were obtained by applying both He-jet techniques and on-line gamma-ray spectroscopy with mechanically pulsed beams. γγt, Xγt, e-γt coincidence measurements as well as time multi-analysis were performed. Internal conversion electrons were recorded with a magnetic selector and multipolarities deduced. Level schemes of 131Pr and 131La are discussed and compared to those of neighboring odd-Z Pr and La isotopes using calculations made in the frame of the Interacting Boson-Fermion Model.

AB - Low-lying levels of 131Pr and 131La isotopes have been investigated by means of β/EC decays of 131Nd and 131Ce, respectively. The radioactive nuclei were produced in the 94Mo+40Ca reaction at a bombarding energy of 255 MeV and transported with a He-jet system. The identification and the characteristics of the 131mPr isomer (5.7 s) were obtained by applying both He-jet techniques and on-line gamma-ray spectroscopy with mechanically pulsed beams. γγt, Xγt, e-γt coincidence measurements as well as time multi-analysis were performed. Internal conversion electrons were recorded with a magnetic selector and multipolarities deduced. Level schemes of 131Pr and 131La are discussed and compared to those of neighboring odd-Z Pr and La isotopes using calculations made in the frame of the Interacting Boson-Fermion Model.

KW - Measured Eγ, Iγ, γγ-coin, Xγ-coin, eγ-coin, internal conversion electrons, T

KW - Radioactivity Nd,Ce(EC),(β)

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U2 - 10.1016/S0375-9474(96)00390-9

DO - 10.1016/S0375-9474(96)00390-9

M3 - Article

AN - SCOPUS:0030599633

SN - 0375-9474

VL - 611

SP - 247

EP - 269

JO - Nuclear Physics, Section A

JF - Nuclear Physics, Section A

IS - 2-3

ER -

Non-yrast level structures in the isotopes ¹³¹Pr and ¹³¹La

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Keywords

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