YRAST STATES IN 188,190Os NUCLEI

2006 ◽  
Vol 15 (08) ◽  
pp. 1797-1802 ◽  
Author(s):  
S. MOHAMMADI ◽  
G. DE ANGELIS ◽  
M. AXIOTIS ◽  
D. BAZZACCO ◽  
P. G. BIZZETI ◽  
...  
Keyword(s):  
Doppler Shift ◽  
Gamma Ray ◽  
Detector Array ◽  
Two Dimensional ◽  
Yrast State ◽  
Inelastic Reaction ◽  
Deep Inelastic Reaction ◽  
Bombarding Energy

Yrast states in neutron rich nuclei 188 Os and 190 Os have been populated using the deep-inelastic reaction 82 Se + 192 Os at 460 MeV beam bombarding energy. A thick 192 Os target (>50 mg/cm 2) with 0.2 mm Ta backing was used to stop all of the recoils in the target, minimising the broadening of the lines due to Doppler shift. High fold γ-γ coincidences were aquired with the 4π spectrometer GASP detector array. Three and two dimensional gamma-ray matrices were used to construct level schemes of the nuclei of interest up to an yrast state of 22.

Branching Ratios and Lifetimes of 25Mg Levels below 5.2 MeV

1974 ◽  
Vol 52 (23) ◽  
pp. 2329-2342 ◽  
Author(s):  
R. W. Ollerhead ◽  
D. C. Kean ◽  
R. M. Gorman ◽  
M. B. Thomson
Keyword(s):  
Doppler Shift ◽  
Gamma Ray ◽  
Branching Ratios ◽  
Surface Barrier ◽  
Surface Barrier Detector ◽  
Rotational Model ◽  
Rotational Bands ◽  
Barrier Detector ◽  
Combined Data

All levels below 5.2 MeV in 25Mg have been studied using the reaction 25Mg(p, p′γ). In-elastically scattered protons were detected in an annular surface barrier detector located at 180°; coincidence gamma-ray spectra were obtained at Ge (Li) detector angles of 90°, 45°, and 135°. Level energies were determined from unshifted gamma-ray energies recorded in the 90° spectra. Lifetimes were obtained from the attenuated Doppler shift of gamma-ray energies recorded in spectra taken at forward and backward angles. Branching ratios were deduced from the combined data of all three angles. The identification of levels as members of rotational bands is discussed, and transition strengths deduced from the present measurements are compared with predictions of the simple rotational model.

scholarly journals Angular momentum transfer and partition in the deep-inelastic reaction 664 MeV 84Kr + natAg

1981 ◽  
Vol 371 (3) ◽  
pp. 510-532 ◽  
Author(s):  
L.G. Sobotka ◽  
C.C. Hsu ◽  
G.J. Wozniak ◽  
D.J. Morrissey ◽  
L.G. Moretto
Keyword(s):  
Angular Momentum ◽  
Momentum Transfer ◽  
Angular Momentum Transfer ◽  
Inelastic Reaction ◽  
Deep Inelastic Reaction

scholarly journals A SEMI-CLASSICAL ANALYSIS OF THE PROTON SEQUENTIAL EMISSION IN 16O+58Ni DEEP INELASTIC COLLISIONS

2005 ◽  
Vol 14 (02) ◽  
pp. 239-254
Author(s):  
L. AUDITORE ◽  
R. BARNÁ ◽  
D. DE PASQUALE ◽  
A. ITALIANO ◽  
A. TRIFIRÓ ◽  
...  
Keyword(s):  
Charged Particles ◽  
Inelastic Collisions ◽  
Classical Analysis ◽  
Fan Effect ◽  
Decay Times ◽  
Inelastic Reaction ◽  
Polarization Phenomena ◽  
Deep Inelastic Reaction ◽  
Light Charged Particles ◽  
Α Particles

We study the 16 O +58 Ni deep inelastic reaction by using coincident charged techniques. Inclusive as well as exclusive data of the C , N , and O fully-damped fragments and their associated light charged particles ( p , d , t , and α-particles) have been collected at the IReS Strasbourg VIVITRON Tandem facility. The velocity distributions of the emitted protons and the associated multiplicity polar plots are analyzed by means of a model which describes simultaneously the nonequilibrium and the evaporative (equilibrated) components of a deep inelastic reaction mechanism. Estimates on polarization phenomena as well as the associated "decay times" of the reaction have been obtained. The hypothesis of a new "fan effect" is proposed for the proton sequential emission in the deep inelastic scattering of 16 O +58 Ni at 8.25 MeV/nucleon.

Femtosecond pump-probe spectroscopy using a two-dimensional smart pixel detector array

2003 ◽  
pp. 687-689
Author(s):  
S. Bourquin ◽  
R. P. Prasankumar ◽  
U. Morgner ◽  
F. Kärtner ◽  
T. Lasser ◽  
...  
Keyword(s):  
Detector Array ◽  
Two Dimensional ◽  
Pixel Detector ◽  
Pump Probe ◽  
Smart Pixel ◽  
Probe Spectroscopy

Development of a Mercuric Iodide Detector Array For In-Vivo X-Ray Imaging

1994 ◽  
Vol 38 ◽  
pp. 615-624
Author(s):  
Bradley E. Patt ◽  
Jan S. Iwanczyk ◽  
Martin P. Tornai ◽  
Craig S. Levin ◽  
Edward J. Hoffman
Keyword(s):  
Gamma Camera ◽  
Gamma Ray ◽  
Active Area ◽  
Detector Array ◽  
Mercuric Iodide ◽  
X Ray ◽  
X Ray Imaging ◽  
Spatial Performance ◽  
Gamma Ray Imaging

Abstract A nineteen element mercuric iodide (HgI2) detector array has been developed in order to investigate the potential of using this technology for in-vivo x-ray and gamma-ray imaging. A prototype cross-grid detector array was constructed with hexagonal pixels of 1.9 mm diameter (active area = 3.28 mm2) and 0.2 mm thick septa. The overall detector active area is roughly 65 mm2. A detector thickness of 1.2 mm was used to achieve about 100% efficiency at 60 keV and 67% efficiency at 140 keV The detector fabrication, geometry and structure were optimized for charge collection and to minimize crosstalk between elements. A section of a standard high resolution cast-lead gamma-camera collimator was incorporated into the detector to provide collimation matching the discrete pixel geometry. Measurements of spectral and spatial performance of the array were made using 241-Am and 99m-Tc sources. These measurements were compared with similar measurements made using an optimized single HgI2 x-ray detector with active area of about 3 mm2 and thickness of 500 μm.

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