Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Tagging of η mesons using the pd3Heη reaction near threshold
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. (nucl)
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. (nucl)
Visa övriga samt affilieringar
2006 (Engelska)Ingår i: Instruments and experimental techniques (New York), ISSN 0020-4412, E-ISSN 1608-3180, Vol. 49, nr 4, s. 461-467Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A zero-degree spectrometer for tagging η mesons on the CELSIUS/WASA facility is described, and its characteristics are presented. Tagging of η mesons is performed by detecting 3He ions produced by reaction pd3Heη close to the production threshold. The low background level (<2%) is in good agreement with the data obtained earlier on the SATURNE accelerator.

Ort, förlag, år, upplaga, sidor
Springer , 2006. Vol. 49, nr 4, s. 461-467
Nationell ämneskategori
Subatomär fysik
Forskningsämne
kärnfysik
Identifikatorer
URN: urn:nbn:se:su:diva-12513DOI: 10.1134/S0020441206040038OAI: oai:DiVA.org:su-12513DiVA, id: diva2:179033
Anmärkning
14 authorsTillgänglig från: 2008-01-15 Skapad: 2008-01-15 Senast uppdaterad: 2017-12-13Bibliografiskt granskad
Ingår i avhandling
1. Mesonic fusion - pion and eta meson production in light ion nuclear fusion reactions
Öppna denna publikation i ny flik eller fönster >>Mesonic fusion - pion and eta meson production in light ion nuclear fusion reactions
2010 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

The present thesis describes two experiments performed in the storage ring CELSIUS at The Svedberg Laboratory in Uppsala. In the first experiment the importance of three - nucleon clustering in the six - nucelon system was investigated. The total cross section for the production of the ground state and the 3.56 MeV second excited state of 6Li in the 3He(3He,6Li)π+ reaction has been measured at two beam energies, 261.1 and 262.5 MeV, corresponding to center - of - mass energies 1.2 and 1.9 MeV above the production threshold for the 3.56 MeV state. For the ground state the result was 347 ± 84 ± 42 and 92 ± 84 ± 11 nb respectively. The result for the 3.56 MeV state, 104 ± 23 ± 12 and 56 ± 35 ± 7 nb respectively, is compared to the result of a previous study where the 3.56 MeV state was populated in the d(4He,6Li)π0 reaction.

In the second experiment a clean sample of 5×105 eta mesons was prepared by means of the d(p,3He)η reaction. Eta production was tagged by the precise determination of the kinetic energy of the associated 3He ions. In the subsequent decay of eta mesons, channels with lepton - anti - lepton pairs were studied in the WASA detector. In a separate study properties of the WASA deuterium pellet target were investigated and in particular the effects on the beam of the beam - target interactions.

In both sets of experiments the fused nuclear system was detected by means of a zero - degree spectrometer with a semiconductor detector telescope. Choosing the detectors to match the rather different requirements, precise information regarding the identity and the momentum of the detected ions could be obtained in both cases.

Ort, förlag, år, upplaga, sidor
Stockholm: Department of Physics, Stockholm University, 2010. s. 99
Nyckelord
pionic fusion, halo nuclei, cross sections, light mesons, eta-meson, WASA detector
Nationell ämneskategori
Subatomär fysik
Forskningsämne
kärnfysik
Identifikatorer
urn:nbn:se:su:diva-39875 (URN)978-91-7447-103-8 (ISBN)
Disputation
2010-10-01, FD5, AlbaNova universitetscentrum, Roslagstullbacken 21, Stockholm, 10:00 (Engelska)
Opponent
Handledare
Tillgänglig från: 2010-09-09 Skapad: 2010-06-02 Senast uppdaterad: 2010-08-26Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltext

Sök vidare i DiVA

Av författaren/redaktören
Bargholtz, ChrGerén, LTegnér, Per-ErikZartova, Irina
Av organisationen
Fysikum
I samma tidskrift
Instruments and experimental techniques (New York)
Subatomär fysik

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 97 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf