Chinese Physics C > 2002, Vol. 26 > Issue(2): 104-107

A New Level Scheme of¹²⁷I

ZHANG Yu-Hu^,,
MA Ying-Jun

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China2 Institute of Physics and Tandem Accelerator Center, University of Tsukuba, Ibaraki 305-0006, Japan

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Abstract：
Study of in beam γ ray spectroscopy of ¹²⁷I has been performed using ¹²⁴Sn( ⁷Li, 4n) ¹²⁷I reaction at 32 MeV beam energy. A new level scheme of ¹²⁷I has been established including 25 new levels and 52 new γ transitions. Negative parity levels based on 11/2 ^－π h _11/2particle state have been observed up to (35/2 ^－) extending our knowledge of decoupled structures to the heavier iodine isotope. Two ΔI=2 yrast positive-parity levels have been proposed to be associated mainly with the πg _7/2configuration due to observations of several strong inter band transitions. Two weakly populated ΔI=2 positive parity levels and a high-lying ΔI=1 cascade have been newly identified and tentatively assigned as πd _5/2one-quasiparticle and three quasiparticle bands, respectively.

References

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ZHANG Yu-Hu and MA Ying-Jun. A New Level Scheme of ¹²⁷I[J]. Chinese Physics C, 2002, 26(2): 104-107.

ZHANG Yu-Hu and MA Ying-Jun. A New Level Scheme of ¹²⁷I[J]. Chinese Physics C, 2002, 26(2): 104-107. shu

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Received: 2001-10-22
Revised: 1900-01-01

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

A New Level Scheme of¹²⁷I

Corresponding author:ZHANG Yu-Hu,

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China2 Institute of Physics and Tandem Accelerator Center, University of Tsukuba, Ibaraki 305-0006, Japan

Received Date:2001-10-22

Accepted Date:1900-01-01

Available Online:2002-02-05

Abstract:Study of in beam γ ray spectroscopy of¹²⁷I has been performed using¹²⁴Sn(⁷Li, 4n)¹²⁷I reaction at 32 MeV beam energy. A new level scheme of¹²⁷I has been established including 25 new levels and 52 new γ transitions. Negative parity levels based on 11/2^－π h_11/2particle state have been observed up to (35/2^－) extending our knowledge of decoupled structures to the heavier iodine isotope. Two ΔI=2 yrast positive-parity levels have been proposed to be associated mainly with the πg_7/2configuration due to observations of several strong inter band transitions. Two weakly populated ΔI=2 positive parity levels and a high-lying ΔI=1 cascade have been newly identified and tentatively assigned as πd_5/2one-quasiparticle and three quasiparticle bands, respectively.

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A New Level Scheme of¹²⁷I

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