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.

The 11B(α,γ0)15N reaction in the giant dipole resonance region

1977 ◽  
Vol 55 (4) ◽  
pp. 302-304 ◽  
Author(s):  
W. Del Bianco ◽  
S. Kundu ◽  
J. Kim
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Yield Curve ◽  
Plastic Scintillator ◽  
Resonance Region ◽  
Crystal Spectrometer ◽  
Dipole Resonance ◽  
Giant Dipole Resonance Region ◽  
Γ Rays

The 90° differential cross section of the 11B(α,γ0)15N reaction has been measured at α-particle energies from 5.74 to 17.80 MeV. 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 three well separated resonances at Eexc = 16.29 ± 0.15, 18.88 ± 0.20, and 21.26 ± 0.20 MeV.

The 12C(3He,γ0)15O reaction in the giant dipole resonance region

1978 ◽  
Vol 56 (8) ◽  
pp. 1054-1056 ◽  
Author(s):  
W. Del Bianco ◽  
J. C. Kim ◽  
G. Kajrys
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Yield Curve ◽  
Resonance Region ◽  
Resonant Structure ◽  
Crystal Spectrometer ◽  
Dipole Resonance ◽  
Giant Dipole Resonance Region ◽  
Γ Rays

The 90° differential cross section of the 12C(3He,γ0)15O reaction has been measured at 3He-particle energies from 5.24 to 13.95 MeV in steps varying from 100 to 300 keV. The γ rays have been detected by a 23 cm long × 23 cm diameter NaI(Tl) crystal spectrometer enclosed in an anticoincidence shield. The yield curve shows a resonant structure at the energies Eexc = 17.04 ± 0.06, 18.65 ± 0.06, 19.55 ± 0.08, 20.40 ± 0.07, and 21.61 ± 0.07 MeV.

The 12C(3He, γ1+2)15O reaction in the giant dipole resonance region

1989 ◽  
Vol 67 (2-3) ◽  
pp. 135-138 ◽  
Author(s):  
J. C. Kim ◽  
G. Kajrys ◽  
W. Del Bianco
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Giant Dipole Resonance ◽  
Yield Curve ◽  
Resonance Region ◽  
Crystal Spectrometer ◽  
Dipole Resonance ◽  
Giant Dipole Resonance Region ◽  
Γ Rays

The 90° differential cross section of the 12C(3He, γ1+2)15O reaction has been measured at 3He particle energies from 5.3 to 16.7 MeV in steps varying from 100 to 300 keV. The γ-rays were detected by a 23 cm long × 23 cm diameter NaI(Tl) crystal spectrometer enclosed in an anticoincidence shield. The yield curve shows a resonant behaviour at the energies Ex = 17.56 ± 0.06, 19.02 ± 0.12, and 23.80 ± 0.10 MeV.

The 13C(d,γ0)15N reaction around Eexc = 17.7 MeV

1978 ◽  
Vol 56 (1) ◽  
pp. 3-5 ◽  
Author(s):  
W. Del Bianco ◽  
N. Marquardt ◽  
K. Farzine ◽  
H. V. Buttlar
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Yield Curve ◽  
Resonance Structure ◽  
Crystal Spectrometer ◽  
Γ Rays

The 95° differential cross section of the 13C(d,γ0)15N reaction has been measured at deuteron energies from 1.1 to 4.2 MeV. The γ rays have been detected by a 25.4 cm long by 25.4 cm diameter NaI(Tl) crystal spectrometer. The yield curve reveals a single resonance structure at Ed = 1.74 ± 0.04 MeV (Eexc = 17.7 MeV).

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.

Angular distribution of the 3H(p,γ)4He reaction at proton energies below 1 MeV

1980 ◽  
Vol 58 (10) ◽  
pp. 1496-1499 ◽  
Author(s):  
W. Del Bianco ◽  
G. Kajrys
Keyword(s):  
Angular Distribution ◽  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Angular Range ◽  
Γ Rays ◽  
Γ Ray ◽  
Energy Dependent

The differential cross section of the 3H(p,γ)4He reaction has been measured at the proton energies Ep = 0.46, 0.50, 0.62, 0.77, and 0.93 MeV. A thin 3H–Ti target has been used and the γ-rays have been detected by a 12.7 cm diameter × 15.2 cm long NaI(Tl) crystal rotating over the angular range θL = 0 to 135°. The 3H(p,γ)4He reaction is found to proceed through E1, M1, and E2 transitions, E1 transitions being predominant. The ratio of the γ-ray flux at θL = 0 and 90° is energy dependent and decreases from 0.017 ± 0.003 at Ep = 0.46 MeV to 0.0078 ± 0.006 at Ep = 0.93 MeV.

scholarly journals PHOTODISINTEGRATION OF ALIGNED DEUTERONS AT ASTROPHYSICAL ENERGIES USING LINEARLY POLARIZED PHOTONS

2013 ◽  
Vol 22 (05) ◽  
pp. 1350030
Author(s):  
S. P. SHILPASHREE ◽  
SWARNAMALA SIRSI ◽  
G. RAMACHANDRAN
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Polar Angle ◽  
University Of Virginia ◽  
Analyzing Powers ◽  
Linearly Polarized ◽  
Γ Rays ◽  
Model Independent ◽  
Polarized Photons

Following the model independent approach to deuteron photodisintegration with linearly polarized γ-rays, we show that the measurements of the tensor analyzing powers on aligned deuterons along with the differential cross-section involve five different linear combinations of the isovector [Formula: see text]; j = 0, 1, 2 amplitudes interfering with the isoscalar M1s and E2s amplitudes. This is of current interest in view of the recent experimental finding [M. A. Blackston et al., Phys. Rev. C78 (2008) 034003] that the three [Formula: see text] amplitudes are distinct and also the reported experimental observation [B. D. Sawatzky, Ph.D. thesis, University of Virginia (2005)] on the front–back (polar angle) asymmetry in the differential cross-section.

The influence of screening on the creation and stopping of electrons

1934 ◽  
Vol 30 (4) ◽  
pp. 524-539 ◽  
Author(s):  
H. A. Bethe
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Cross Sections ◽  
Differential Cross ◽  
Main Part ◽  
Primary Particle ◽  
Asymptotic Value ◽  
Fast Electrons ◽  
High Energies ◽  
Γ Rays

The cross-sections for the emission of radiation by very fast electrons (energy great compared with mc2) and for the production of pairs of positive and negative electrons by very hard γ-rays is calculated, considering the screening of the atomic field in which the processes happen. The main part of the paper deals with the integration of the differential cross-section over the angles. It is found that the integral cross-section increases steadily with increasing energy of the primary particle, reaching an asymptotic value for extremely high energies.

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