eprintid: 1362267
rev_number: 30
eprint_status: archive
userid: 608
dir: disk0/01/36/22/67
datestamp: 2012-09-15 18:54:24
lastmod: 2021-09-20 00:34:43
status_changed: 2012-09-15 18:54:24
type: article
metadata_visibility: show
item_issues_count: 0
creators_name: Cassidy, DB
creators_name: Deng, SHM
creators_name: Tanaka, HKM
creators_name: Mills, AP
creators_name: Greaves, RG
creators_name: Maruo, T
creators_name: Nishiyama, N
creators_name: Snyder, JB
title: Experiments with a high-density positronium gas
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F60
note: © 2005 The American Physical Society
abstract: We have created a high-density gas of interacting positronium (Ps) atoms by irradiating a thin film of nanoporous silica with intense positron bursts and measured the Ps lifetime using a new single-shot technique. When the positrons were compressed to 3.3×1010cm-2, the apparent intensity of the orthopositronium lifetime component was found to decrease by 33%. We believe this is due to a combination of spin exchange quenching and Ps2 molecule formation associated with colliding pairs of oppositely polarized triplet positronium atoms. Our data imply an effective cross section for this process of 2.9×10-14cm-2. © 2005 The American Physical Society.
date: 2005-11-04
official_url: http://dx.doi.org/10.1103/PhysRevLett.107.191802
vfaculties: VMPS
oa_status: green
primo: open
primo_central: open_green
verified: verified_manual
elements_source: Scopus
elements_id: 440105
doi: 10.1103/PhysRevLett.95.195006
lyricists_name: Cassidy, David
lyricists_id: DBCAS57
full_text_status: public
publication: Physical Review Letters
volume: 95
number: 19
article_number: 195006
issn: 0031-9007
citation:        Cassidy, DB;    Deng, SHM;    Tanaka, HKM;    Mills, AP;    Greaves, RG;    Maruo, T;    Nishiyama, N;           Cassidy, DB;  Deng, SHM;  Tanaka, HKM;  Mills, AP;  Greaves, RG;  Maruo, T;  Nishiyama, N;  Snyder, JB;   - view fewer <#>    (2005)    Experiments with a high-density positronium gas.                   Physical Review Letters , 95  (19)    , Article 195006.  10.1103/PhysRevLett.95.195006 <https://doi.org/10.1103/PhysRevLett.95.195006>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/1362267/1/1362267.pdf