scholarly journals Positron annihilation on polycyclic aromatic hydrocarbon molecules in the interstellar medium

2010 ◽  
Vol 402 (2) ◽  
pp. 1171-1178 ◽  
Author(s):  
N. Guessoum ◽  
P. Jean ◽  
W. Gillard
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Interstellar Medium ◽  
Aromatic Hydrocarbon ◽  
Positron Annihilation ◽  
Polycyclic Aromatic ◽  
Hydrocarbon Molecules

Positron annihilation in a simulated interstellar medium

1996 ◽  
Vol 74 (7-8) ◽  
pp. 407-410 ◽  
Author(s):  
K. Iwata ◽  
R. G. Greaves ◽  
C. M. Surko
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Interstellar Medium ◽  
Aromatic Hydrocarbon ◽  
Positron Annihilation ◽  
Molecular Hydrogen ◽  
Penning Trap ◽  
Small Admixture ◽  
Polycyclic Aromatic ◽  
Γ Ray

The annihilation of positrons in a simulated interstellar medium consisting of molecular hydrogen and a small admixture of the polycyclic aromatic hydrocarbon, naphthalene, was studied in a Penning trap containing cold positrons. The experiments demonstrate the ability to distinguish two distinct components in the annihilation γ-ray spectra. The significance of the experiment for the analysis of γ-ray spectra of astrophysical origin is discussed.

scholarly journals IONIZATION OF POLYCYCLIC AROMATIC HYDROCARBON MOLECULES AROUND THE HERBIG Ae/Be ENVIRONMENT

2011 ◽  
pp. 143-154
Author(s):  
ITSUKI SAKON ◽  
TAKASHI ONAKA ◽  
YOSHIKO K. OKAMOTO ◽  
HIROKAZU KATAZA ◽  
HIDEHIRO KANEDA ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Polycyclic Aromatic ◽  
Hydrocarbon Molecules

scholarly journals Chemistry of Molecular Clouds

1989 ◽  
Vol 120 ◽  
pp. 2-12
Author(s):  
A. Dalgarno
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Ultraviolet Radiation ◽  
Aromatic Hydrocarbon ◽  
Molecular Clouds ◽  
Cosmic Ray ◽  
Radiation Fields ◽  
Polycyclic Aromatic ◽  
Hydrocarbon Molecules ◽  
Ultraviolet Photons

AbstractA discussion is presented of the chemistry of quiescent molecular clouds, and the effects of the presence of polycyclic aromatic hydrocarbon molecules and of cosmic-ray induced ultraviolet photons are examined. A comparison is made with the chemistry occurring in molecular clouds that are subjected to shocks and the differences between dissociative and non-dissociative shocks are described. The changes in composition caused by intense cosmic ray fluxes or intense ultraviolet radiation fields are explored.

scholarly journals Identification of stable configurations in the superhydrogenation sequence of polycyclic aromatic hydrocarbon molecules

2019 ◽  
Vol 486 (4) ◽  
pp. 5492-5498 ◽  
Author(s):  
Pernille A Jensen ◽  
Mirko Leccese ◽  
Frederik D S Simonsen ◽  
Anders W Skov ◽  
Matteo Bonfanti ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Polycyclic Aromatic ◽  
Hydrocarbon Molecules
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