Core-excitations in 209Po

A. R. Poletti; G. D. Dracoulis; A. P. Byrne; A. E. Stuchbery; B. Fabricius; T. Kibédi; P. M. Davidson

doi:10.1016/S0375-9474(99)00421-2

Core-excitations in ²⁰⁹Po

A. R. Poletti^*, G. D. Dracoulis, A. P. Byrne, A. E. Stuchbery, B. Fabricius, T. Kibédi, P. M. Davidson

^*Corresponding author for this work

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

10 Citations (Scopus)

Abstract

The properties of high spin states in ²⁰⁹Po have been investigated using the ²⁰⁴Hg (⁹Be,4n) ²⁰⁹ Po reaction at a bombarding energy of 62 MeV. Decay properties for states in ²⁰⁹Po up to an excitation energy of 8392 keV and spins up to J = (47/2) have been deduced. The mean life of the level at 4266 keV was determined as 172(5) ns and a limit of < 15 ns was determined for that at 5504 keV. The level scheme is compared with predictions of multi-particle shell model calculations. The lowest core excited state is confirmed to be the 31/2- state at 4266 keV. Another core excited state lies at 5356 keV, while above 5.5 MeV the yrast line is exclusively composed of such excitations.

Original language	English
Pages (from-to)	318-331
Number of pages	14
Journal	Nuclear Physics A
Volume	665
Issue number	3-4
DOIs	https://doi.org/10.1016/S0375-9474(99)00421-2
Publication status	Published - 28 Feb 2000

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title = "Core-excitations in 209Po",

abstract = "The properties of high spin states in 209Po have been investigated using the 204Hg (9Be,4n) 209 Po reaction at a bombarding energy of 62 MeV. Decay properties for states in 209Po up to an excitation energy of 8392 keV and spins up to J = (47/2) have been deduced. The mean life of the level at 4266 keV was determined as 172(5) ns and a limit of < 15 ns was determined for that at 5504 keV. The level scheme is compared with predictions of multi-particle shell model calculations. The lowest core excited state is confirmed to be the 31/2- state at 4266 keV. Another core excited state lies at 5356 keV, while above 5.5 MeV the yrast line is exclusively composed of such excitations.",

keywords = "Measured γγ(t), E, I(θ), I(E,t), Nuclear reactions Hg(Be,4n)Po, E = 55-65 MeV",

author = "Poletti, \{A. R.\} and Dracoulis, \{G. D.\} and Byrne, \{A. P.\} and Stuchbery, \{A. E.\} and B. Fabricius and T. Kib{\'e}di and Davidson, \{P. M.\}",

year = "2000",

month = feb,

day = "28",

doi = "10.1016/S0375-9474(99)00421-2",

language = "English",

volume = "665",

pages = "318--331",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier B.V.",

number = "3-4",

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TY - JOUR

T1 - Core-excitations in 209Po

AU - Poletti, A. R.

AU - Dracoulis, G. D.

AU - Byrne, A. P.

AU - Stuchbery, A. E.

AU - Fabricius, B.

AU - Kibédi, T.

AU - Davidson, P. M.

PY - 2000/2/28

Y1 - 2000/2/28

N2 - The properties of high spin states in 209Po have been investigated using the 204Hg (9Be,4n) 209 Po reaction at a bombarding energy of 62 MeV. Decay properties for states in 209Po up to an excitation energy of 8392 keV and spins up to J = (47/2) have been deduced. The mean life of the level at 4266 keV was determined as 172(5) ns and a limit of < 15 ns was determined for that at 5504 keV. The level scheme is compared with predictions of multi-particle shell model calculations. The lowest core excited state is confirmed to be the 31/2- state at 4266 keV. Another core excited state lies at 5356 keV, while above 5.5 MeV the yrast line is exclusively composed of such excitations.

AB - The properties of high spin states in 209Po have been investigated using the 204Hg (9Be,4n) 209 Po reaction at a bombarding energy of 62 MeV. Decay properties for states in 209Po up to an excitation energy of 8392 keV and spins up to J = (47/2) have been deduced. The mean life of the level at 4266 keV was determined as 172(5) ns and a limit of < 15 ns was determined for that at 5504 keV. The level scheme is compared with predictions of multi-particle shell model calculations. The lowest core excited state is confirmed to be the 31/2- state at 4266 keV. Another core excited state lies at 5356 keV, while above 5.5 MeV the yrast line is exclusively composed of such excitations.

KW - Measured γγ(t), E, I(θ), I(E,t)

KW - Nuclear reactions Hg(Be,4n)Po, E = 55-65 MeV

UR - https://www.scopus.com/pages/publications/0034723488

U2 - 10.1016/S0375-9474(99)00421-2

DO - 10.1016/S0375-9474(99)00421-2

M3 - Article

SN - 0375-9474

VL - 665

SP - 318

EP - 331

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 3-4

ER -

Core-excitations in ²⁰⁹Po

Abstract

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