Measurement of the Gamma Ray Energy in Parapositronium 2γ Decay

ZHANG Tian-Bao; WANG Hai-Dong; SHEN Zhi-Qi

近期发现有不法分子冒充我刊与作者联系，借此进行欺诈等不法行为，请广大作者加以鉴别，如遇诈骗行为，请第一时间与我刊编辑部联系确认（《中国物理C》（英文）编辑部电话：010-88235947,010-88236950），并作报警处理。

本刊再次郑重声明：

（1）本刊官方网址为cpc.ihep.ac.cn和https://iopscience.iop.org/journal/1674-1137

（2）本刊采编系统作者中心是投稿的唯一路径，该系统为ScholarOne远程稿件采编系统，仅在本刊投稿网网址（https://mc03.manuscriptcentral.com/cpc）设有登录入口。本刊不接受其他方式的投稿，如打印稿投稿、E-mail信箱投稿等，若以此种方式接收投稿均为假冒。

（3）所有投稿均需经过严格的同行评议、编辑加工后方可发表，本刊不存在所谓的“编辑部内部征稿”。如果有人以“编辑部内部人员”名义帮助作者发稿，并收取发表费用，均为假冒。

《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 1991, Vol. 15> Issue(6) : 486-492

Measurement of the Gamma Ray Energy in Parapositronium 2γ Decay

Institute of High Energy Physics,Academia Sinica,Beijing 100080

Abstract
HTML
Reference
Related

PDF

Abstract：
Using a silica aerogel sample with oxygen gas introduced as the positronium source,the γ ray energy from the parapositronium 2γ annihilation has been measured as 510998.7(2.5)eV by means of the comparison with the known γ energy 511856.2(2.3)eV of the ¹⁰⁶Ru γ ray.The result,after a revision of the binding energy of positronium,is comparied with the adjusted value of the electron rest mass published in several years ago.

References

[1]

C. Y. Chao, Phys. Rev., 36(1930), 1519.[2] J. W. M. DuMond, D. A. Lind and B. B. Waston, PJeys. Rev., 75(1949), 1226.[3] J. W. Knowles, Proc. 2nd Intern. Conf, on Nuclidic Masses, ed. by W. Johnson, (Springer Verlag, Vienna,1964) p113.[4] B. N. Taylor, W. H. Parker and D. N. Langenbcrq, Rev. Mad. Phys., 41(1969), 375.[5] E. R. Cohen and S. N. Taylor, Journal of Fhys. Chem. Reference Data, V2, N4(1973), 663.[6] K. Fransson, et al., Nucl. Instr. Methods, 138(1976), 479[7] H. Kumabora, H, Inoue and Y. Yoshizawa, Nucl. Instr. Methods, 206(1983), 489.[8] K. Shizuma, H. Inoue and Y. Yoshizawa, Nucl. Instr. Methods, 137(1976), 599.[9] E. R. Cohen, CODATA Bulletin, No, 63 Nev. 1986, 1.[10] 张天保、徐敏, 高能物理与核物理, 14(1990), 289,[11] 徐敏、曾湘涛、黄开平、张天保, 高能物理与核物理, 12(1988), 447.[12] E. G. Kessler, et al, Phys, Rev. lett., 40(1978), 171.

[1]	XU Yan-Bing , LIAO Ji-Zhi . Studies on the HF States and the Negative-Parity Spectra of Even Even Cd Nuclei. Chinese Physics C, 2003, 27(2): 142-146.
[2]	ZHOU Chun-Lan , WANG Dan-Ni , HE Chuang-Xin , WANG Bao-Yi , WEI Long , HE Qing , JIA Quan-Jie . Study on Pores and Defect by Synthrotron Radiation Small Angle Reflection Method and Slow Positron Annihilation Technique. Chinese Physics C, 2003, 27(S1): 67-71.
[3]	XU Yan-Bing , LIAO Ji-Zhi . Studies on the HF States and the Negative Parity Bands of Even Even Ge and Se Nuclei. Chinese Physics C, 2002, 26(6): 613-619.
[4]	Zhang Zhanjun , Liu Yong , Sang Jianping . Microscopic Study of Low-Lying States of Even ^190─200Pt Isotopes. Chinese Physics C, 1998, 22(9): 836-843.
[5]	Liu Bo , Dong Yubing . Color Screeing and Dissociation of Heavy Quarkonium. Chinese Physics C, 1996, 20(2): 153-158.
[6]	BES Collaboration . Determination of the Total Width of P-wave Charmonium State χ_c0. Chinese Physics C, 1996, 20(12): 1057-1067.
[7]	Peng Liangqiang , Zhang Tianbao , Wang Haidong , Meng Bonian , Yin Guoli . Improved Measurement of γ-Energy from Parapositronium 2γ-Decay. Chinese Physics C, 1995, 19(11): 987-990.
[8]	Sang Jianping , Liu Yong . The Microscopic Investigation of High-Spin States for Even-Even Nuclei(III)Application to isotopes ¹²⁶Ba,¹²⁸Ba and ¹³⁰Ba. Chinese Physics C, 1994, 18(12): 1102-1106.
[9]	Liu Bo , Zhao Weiqin . Contribution Due to Gluon Shadowing and Final-State Interactions to Charmonium/Bottonium Suppression in h-A Collisions. Chinese Physics C, 1994, 18(5): 443-447.
[10]	Zhang Dali , Liu Yuxin , Han Qizhi . An IBM2 Description on the Low-lying States of Even-even Xe Isotopes. Chinese Physics C, 1994, 18(12): 1130-1136.
[11]	CHENG Zi-Tao , QIAN Qing , FU Yun-Chang , CHEN Xue-Jun . Study of Antihydrogen Atom Formation in Collisions of Antiprotons with Positronium. Chinese Physics C, 1993, 17(5): 448-454.
[12]	GUO Xue-Zhe , WENG Hui-Min , HAN Rong-Dian . The Observation of Positron Surface State of Germanium. Chinese Physics C, 1992, 16(11): 961-964.
[13]	LUO Zhen-Fei , QIU Xi-Jun . Mass Splittings of L=1 States of Quarkonium and Lorentz Structure of Long-rang Confinement Potential. Chinese Physics C, 1992, 16(8): 716-722.
[14]	ZHANG Tian-Bao , YANG Guang-Ming , GUO Bao-Nian , WANG Hai-Dong . Experimental Investigation for the Decay Rate of Orthopositronium. Chinese Physics C, 1992, 16(7): 577-581.
[15]	ZHOU Xian-Yi , ZHANG Han , YUAN Song-Liu , WANG Shun-Xi , ZHU Jing-Sheng , ZHANG Qi-Rui . 1D-ACAR Spectra of YBa_2－xSr_xCu₃O_y. Chinese Physics C, 1991, 15(11): 961-965.
[16]	ZHANG Tian-Bao , XU Min . TRIPLET TO SINGLET CONVERSION OF POSITRONIUM IN OXYGEN. Chinese Physics C, 1990, 14(4): 289-295.
[17]	YANG Bao-Zhong , TAN Yong , TANG Xiao-Wei , BIAN Zu-He . THE ANGULAR DISTRIBUTION OF PHOTONS IN ORTHOPOS-ITRONIUM THREE PHOTON DECAY. Chinese Physics C, 1989, 13(6): 487-489.
[18]	XU Min , ZENG Xiang-Tao , HUANG Kai-Ping , ZHANG Tian-Bao . EFFECT OF THE ENERGY LOSS PROCESS ON THE ANNIHILATION OF ORTHOPOSITRONIUM IN SILICA AEROGEL. Chinese Physics C, 1988, 12(4): 447-454.
[19]	ZHANG Tian-Bao , TANG Xiao-Wei , WANG Yun-Yu , LI Yao-Qing , YIU Ke , WANG Shao-Jie . MEASUREMENT OF THE WHOLE GAMMA-RAY ENERGY SPECTRUM IN o-Ps 3 GAMMA-DECAY. Chinese Physics C, 1984, 8(4): 385-391.
[20]	ZHANG Tian-Bao , WANG Yun-Yu , ZHANG Chang-Chun , WANG Shao-Jie . THE OBSERVATION ON o-P_s ANNIHILATION IN SILICA AEROGEL BY COMBINED SPECTROMETER. Chinese Physics C, 1983, 7(1): 1-4.

Access

Get Citation

ZHANG Tian-Bao, WANG Hai-Dong and SHEN Zhi-Qi. Measurement of the Gamma Ray Energy in Parapositronium 2γ Decay[J]. Chinese Physics C, 1991, 15(6): 486-492.

ZHANG Tian-Bao, WANG Hai-Dong and SHEN Zhi-Qi. Measurement of the Gamma Ray Energy in Parapositronium 2γ Decay[J]. Chinese Physics C, 1991, 15(6): 486-492. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 1900-01-01
Revised: 1900-01-01

Article Metric

Article Views(2385)
PDF Downloads(454)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Measurement of the Gamma Ray Energy in Parapositronium 2γ Decay

Corresponding author: ZHANG Tian-Bao,

Institute of High Energy Physics,Academia Sinica,Beijing 100080

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1991-06-05

Abstract: Using a silica aerogel sample with oxygen gas introduced as the positronium source,the γ ray energy from the parapositronium 2γ annihilation has been measured as 510998.7(2.5)eV by means of the comparison with the known γ energy 511856.2(2.3)eV of the ¹⁰⁶Ru γ ray.The result,after a revision of the binding energy of positronium,is comparied with the adjusted value of the electron rest mass published in several years ago.