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Atomic approaches in metastable antiprotonic helium atoms. REPLY to `analysis of the lifetimes and fractions of antiprotons trapped in metastable antiprotonic-helium states` by I. Shimamura and M. Kimura

Technical Report:

Abstract

In the present note the authors clarify the purpose of YO and complement its essential points, thus showing that the criticisms of SK are inappropriate. The paper YO [1] was aimed at discussing some new aspects related to the metastability of hadronic helium atoms which had been discovered when negative kaons [2], negative pions [3] and antiprotons [4] were stopped in liquid helium. The delayed fraction, time spectrum shape and lifetimes were the observables. Further experimental studies are in progress [5], and as of today there is no successful explanation for these interesting phenomena. So, YO tried to give brief and rather qualitative estimates for the observations in an intuitive way, considering only the leading terms. The following problems are discussed in as simple a manner as possible, starting from the exotic-atom viewpoints of Condo [6] and Russell [7]: (i)the atomic core polarization effect, (ii)the structure and radiative lifetimes, (iii)the non-statistical distribution of the angular momentum and an estimate of the delayed fraction, and (iv)the isotope effect, though the title represents only (i). To respond to the comments of SK, it is important to consider the correspondence between the atomic approach and the molecular approach for the metastable antiprotonic helium  More>>
Publication Date:
Aug 01, 1994
Product Type:
Technical Report
Report Number:
INS-1050
Reference Number:
SCA: 664500; PA: JPN-94:012136; EDB-95:032838; SN: 95001319944
Resource Relation:
Other Information: PBD: Aug 1994
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; HELIUM; METASTABLE STATES; LIFETIME; HADRONIC ATOMS; ELECTRONIC STRUCTURE; QUANTUM MECHANICS; ANGULAR MOMENTUM; POLARIZATION; ISOTOPE EFFECTS; ANTIPROTONS; 664500; SPECIAL ATOMS AND MOLECULES
OSTI ID:
10111034
Research Organizations:
Tokyo Univ., Tanashi (Japan). Inst. for Nuclear Study
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Other: ON: DE95737228; TRN: JP9412136
Availability:
OSTI; NTIS; INIS
Submitting Site:
JPN
Size:
13 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Yamazaki, Toshimitsu, and Ohtsuki, Kazumasa. Atomic approaches in metastable antiprotonic helium atoms. REPLY to `analysis of the lifetimes and fractions of antiprotons trapped in metastable antiprotonic-helium states` by I. Shimamura and M. Kimura. Japan: N. p., 1994. Web.
Yamazaki, Toshimitsu, & Ohtsuki, Kazumasa. Atomic approaches in metastable antiprotonic helium atoms. REPLY to `analysis of the lifetimes and fractions of antiprotons trapped in metastable antiprotonic-helium states` by I. Shimamura and M. Kimura. Japan.
Yamazaki, Toshimitsu, and Ohtsuki, Kazumasa. 1994. "Atomic approaches in metastable antiprotonic helium atoms. REPLY to `analysis of the lifetimes and fractions of antiprotons trapped in metastable antiprotonic-helium states` by I. Shimamura and M. Kimura." Japan.
@misc{etde_10111034,
title = {Atomic approaches in metastable antiprotonic helium atoms. REPLY to `analysis of the lifetimes and fractions of antiprotons trapped in metastable antiprotonic-helium states` by I. Shimamura and M. Kimura}
author = {Yamazaki, Toshimitsu, and Ohtsuki, Kazumasa}
abstractNote = {In the present note the authors clarify the purpose of YO and complement its essential points, thus showing that the criticisms of SK are inappropriate. The paper YO [1] was aimed at discussing some new aspects related to the metastability of hadronic helium atoms which had been discovered when negative kaons [2], negative pions [3] and antiprotons [4] were stopped in liquid helium. The delayed fraction, time spectrum shape and lifetimes were the observables. Further experimental studies are in progress [5], and as of today there is no successful explanation for these interesting phenomena. So, YO tried to give brief and rather qualitative estimates for the observations in an intuitive way, considering only the leading terms. The following problems are discussed in as simple a manner as possible, starting from the exotic-atom viewpoints of Condo [6] and Russell [7]: (i)the atomic core polarization effect, (ii)the structure and radiative lifetimes, (iii)the non-statistical distribution of the angular momentum and an estimate of the delayed fraction, and (iv)the isotope effect, though the title represents only (i). To respond to the comments of SK, it is important to consider the correspondence between the atomic approach and the molecular approach for the metastable antiprotonic helium atom of Condo-Russell. We therefore begin this note with a discussion of this aspect. (author).}
place = {Japan}
year = {1994}
month = {Aug}
}