scholarly journals Role of N/Z in giant dipole resonance γ rays as a probe of post-saddle nuclear dissipation

2009 ◽  
Vol 681 (5) ◽  
pp. 413-417 ◽  
Author(s):  
W. Ye
Keyword(s):  
Giant Dipole Resonance ◽  
Dipole Resonance ◽  
Γ Rays ◽  
Nuclear Dissipation

The 11B(d,γ0)13C reaction in the region of the giant dipole resonance

1981 ◽  
Vol 59 (6) ◽  
pp. 781-783 ◽  
Author(s):  
G. Kajrys ◽  
W. Del Bianco ◽  
J. Kim ◽  
S. Landsberger ◽  
R. Lecomte ◽  
...  
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Giant Dipole Resonance ◽  
Yield Curve ◽  
Plastic Scintillator ◽  
Resonant Structure ◽  
Crystal Spectrometer ◽  
Dipole Resonance ◽  
Γ Rays

The 90° differential cross section of the 11B(d,γ0)13C reaction has been measured at deuteron energies from 1.95 to 12.0 MeV in steps varying from 100 to 200 keV. The γ-rays have been detected by a 23 cm long × 23 cm diameter NaI(Tl) crystal spectrometer enclosed in a plastic scintillator anticoincidence shield. The yield curve shows a resonant structure at the energies Eexe = 20.4 ± 0.1 and 22.0 ± 0.2 MeV.

Giant dipole resonance decay and bremsstrahlung emission as a source of high-energy γ-rays in 12C+24,26Mg and 12C+58,64Ni reactions at 6–11 MeV/u

1999 ◽  
Vol 649 (1-4) ◽  
pp. 130-134
Author(s):  
M. Kicińska-Habior ◽  
Z. Trznadel ◽  
A. Maj ◽  
M.P. Kelly ◽  
J.P.S. van Schagen ◽  
...  
Keyword(s):  
Giant Dipole Resonance ◽  
High Energy ◽  
Dipole Resonance ◽  
Resonance Decay ◽  
Bremsstrahlung Emission ◽  
Γ Rays

The giant dipole resonance of mass-15 nuclei and the 12C(3He,γ0)15O and 11B(α,γ0)15N reactions

1984 ◽  
Vol 62 (3) ◽  
pp. 288-296 ◽  
Author(s):  
W. Del Bianco ◽  
G. Kajrys ◽  
J. Kim ◽  
S. Kundu ◽  
S. Landsberger ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Giant Dipole Resonance ◽  
Yield Curve ◽  
Plastic Scintillator ◽  
Angular Distributions ◽  
Crystal Spectrometer ◽  
Yield Curves ◽  
Dipole Resonance ◽  
Γ Rays ◽  
Two Peaks

The angular distributions of the 11B(α,γ0)15N and 12C(3He, γ0)15O reactions have been measured at several energies over the giant dipole resonance (GDR) of the two residual nuclei. The 90° yield curve of the 11B(α,γ0)15N reaction has been remeasured with improved energy resolution over the energy ranges Eα = 6.89 – 8.0 and 12.8 – 15 MeV. The γ-rays were detected by a 23-cm long × 23-cm diameter NaI(Tl) crystal spectrometer enclosed in a plastic scintillator anticoincidence shield. Spins and parities of the resonances observed in the yield curves were obtained; the structure previously observed in the yield curve of the 11B(α, γ0)15N reaction between Eα = 7 and 8 MeV has been resolved into two peaks.

PROBING NUCLEAR FRICTION WITH γ RAYS

2010 ◽  
Vol 19 (08n09) ◽  
pp. 1616-1622
Author(s):  
WEI YE ◽  
FENG WU
Keyword(s):  
Giant Dipole Resonance ◽  
Heavy Nuclei ◽  
Model Calculations ◽  
Langevin Model ◽  
Dipole Resonance ◽  
Γ Rays ◽  
Γ Ray

We study the variation of the post-saddle giant dipole resonance (GDR) γ-ray multiplicity associated with the fission of the heavy nuclei 240 Cf , 246 Cf , 252 Cf and 240 U with the post-saddle friction strength (β) in the framework of a Langevin model. Calculations show the emitted post-saddle γ emission becomes less sensitive to β with increasing isospin of the the system, and the sensitivity almost disappears for the case of 240 U . We suggest that to accurately obtain information of the post-saddle friction strength by measuring pre-scission GDR γ-ray multiplicities, it is optimal to choose among the various compound systems those with low isospin.

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