Study of Delayed States in 94Nb, 108Ag, and 110Ag

1971 ◽  
Vol 49 (6) ◽  
pp. 747-755 ◽  
Author(s):  
S. C. Gujrathi ◽  
J. M. d'Auria ◽  
R. G. Korteling
Keyword(s):  
High Resolution ◽  
Level Scheme ◽  
Half Life ◽  
Gamma Transition ◽  
Low Energy ◽  
X Ray ◽  
Upper Limits ◽  
Energy Gamma ◽  
Gamma Transitions ◽  
First Time

The lifetimes and energies associated with low-energy gamma transitions from the 93Nb(n,γ)94Nb, 107Ag(n,γ)108Ag, and 109Ag(n,γ)110Ag reactions have been studied using a high-resolution Ge(Li) X-ray spectrometer. New weak transitions are observed in the decay of 110Ag at 30.84, 38.19, 41.78, and 136.65 keV, while intense gamma transitions at 105.6, 235.8, and 266.95 keV are resolved into doublets. The half-life of the state involving the intense 117.47 keV transition in 110Ag and the 215 keV transition in 108Ag is confirmed as 36.5 ± 2.0 ns and 54 ± 8 ns, respectively, while a new delayed state associated with the gamma transition of 99.404 keV (T1/2 = 30 ± 5 ns) in 94Nb is observed for the first time. The upper limits for the half-lives involving most of the intense transitions in all the three isotopes are also reported. A level scheme is proposed and discussed for 108Ag.

Nature of Some Transitions Occurring in 97Nb Populated from the Decay of 97Zr

1971 ◽  
Vol 49 (12) ◽  
pp. 1649-1661 ◽  
Author(s):  
D. S. Murty ◽  
P. Jagam ◽  
V. Lakshminarayana
Keyword(s):  
Low Energy ◽  
Magnetic Spectrometer ◽  
Correlation Experiment ◽  
Conversion Coefficients ◽  
Energy Gamma ◽  
Gamma Transitions ◽  
Double Focusing ◽  
First Time

Some of the low energy gamma transitions occurring in the decay of 97Zr to 97Nb were investigated with a 50 cm radius double focusing magnetic spectrometer. On the basis of the conversion coefficients determined from this investigation, a gamma–gamma directional correlation experiment was carried out for the 355–1750 keV cascade occurring in 97Nb. The combined results of the two investigations made it possible to assign spins and parities for a few levels in 97Nb for the first time.

Development of a low-energy high resolution X-ray camera for high-energy gamma photon background environments

2017 ◽  
Vol 54 (9) ◽  
pp. 933-939
Author(s):  
Koki Ando ◽  
Seiichi Yamamoto ◽  
Keisuke Kurita ◽  
Nobuo Suzui ◽  
Yong-Gen Yin ◽  
...  
Keyword(s):  
High Resolution ◽  
High Energy ◽  
Low Energy ◽  
Gamma Photon ◽  
X Ray ◽  
High Energy Gamma ◽  
Energy Gamma

Low Energy Gamma Transitions in 171Tm

1970 ◽  
Vol 25 (7) ◽  
pp. 1043-1045 ◽  
Author(s):  
M. S. El-Nesr
Keyword(s):  
High Resolution ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Low Energy ◽  
Conversion Coefficients ◽  
Energy Gamma ◽  
Gamma Transitions ◽  
Double Focusing

The low energy gamma-ray spectrum of 171Er has been studied with the use of both Ge (Li) gamma-ray and a high resolution iron free double focusing beta-ray spectrometer. The data provide K-conversion coefficients and multipolarities of eight gamma-rays. Spin and parity assignments 7/2+, 3/2+, 5/2+ and 5/2+ are given to the 636, 676, 738 and 913 keV levels respectively

scholarly journals Constraints on the late X-ray radiation from the low-energy gamma-ray burst of December 3, 2003: INTEGRAL data

2006 ◽  
Vol 32 (5) ◽  
pp. 297-301 ◽  
Author(s):  
S. Yu. Sazonov ◽  
A. A. Lutovinov ◽  
E. M. Churazov ◽  
R. A. Sunyaev
Keyword(s):  
Gamma Ray ◽  
Low Energy ◽  
Gamma Ray Burst ◽  
X Ray ◽  
Energy Gamma ◽  
Integral Data

scholarly journals Shadow monochromatic backlighting: Large-field high resolution X-ray shadowgraphy with improved spectral tunability

2001 ◽  
Vol 19 (2) ◽  
pp. 285-293 ◽  
Author(s):  
T.A. PIKUZ ◽  
A. YA. FAENOV ◽  
M. FRAENKEL ◽  
A. ZIGLER ◽  
F. FLORA ◽  
...  
Keyword(s):  
High Resolution ◽  
High Spatial Resolution ◽  
Field Of View ◽  
Large Field ◽  
X Ray ◽  
Traditional Scheme ◽  
Wide Range ◽  
Wide Wavelength Range ◽  
Bent Crystals ◽  
First Time

The shadow monochromatic backlighting (SMB) scheme, a modification of the well-known soft X-ray monochromatic backlighting scheme, is proposed. It is based on a spherical crystal as the dispersive element and extends the traditional scheme by allowing one to work with a wide range of Bragg angles and thus in a wide spectral range. The advantages of the new scheme are demonstrated experimentally and supported numerically by ray-tracing simulations. In the experiments, the X-ray backlighter source is a laser-produced plasma, created by the interaction of an ultrashort pulse, Ti:Sapphire laser (120 fs, 3–5 mJ, 1016 W/cm2 on target) or a short wavelength XeCl laser (10 ns, 1–2 J, 1013 W/cm2 on target) with various solid targets (Dy, Ni + Cr, BaF2). In both experiments, the X-ray sources are well localized spatially (∼20 μm) and are spectrally tunable in a relatively wide wavelength range (λ = 8–15 Å). High quality monochromatic (δλ/λ ∼ 10−5–10−3) images with high spatial resolution (up to ∼4 μm) over a large field of view (a few square millimeters) were obtained. Utilization of spherically bent crystals to obtain high-resolution, large field, monochromatic images in a wide range of Bragg angles (35° < Θ < 90°) is demonstrated for the first time.

Excited fluorescence in low-Z elements by the low-energy gamma transitions and L X-rays from a 241-am XRF source

1987 ◽  
Vol 16 (3) ◽  
pp. 143-146 ◽  
Author(s):  
V. Delgado ◽  
L. González ◽  
A. López ◽  
P. Morán ◽  
E. Vañó
Keyword(s):  
Low Energy ◽  
X Rays ◽  
Energy Gamma ◽  
Gamma Transitions

Excitation function for α-particle-induced reactions in light-mass nuclei

1993 ◽  
Vol 71 (3-4) ◽  
pp. 115-121 ◽  
Author(s):  
N. L. Singh ◽  
S. Agarwal ◽  
J. Rama Rao
Keyword(s):  
High Resolution ◽  
Inelastic Scattering ◽  
Excitation Function ◽  
Low Energy ◽  
Activation Technique ◽  
Scattering Effects ◽  
Foil Activation ◽  
Stacked Foil Activation Technique ◽  
First Time ◽  
Existing Data

The excitation functions of 51V [(α, xn), x = 1.3; (α, p3n); (α, α3n) (α, 2α)] and 59Co[(α, 2n); (α, αxn); x = 1, 2] reactions were measured up to 50 MeV by the stacked-foil activation technique and high-resolution Ce(Li)–HPGe spectroscopy method. Of these 51V(α, xnypzα) reactions were studied for the first time with better accuracy than earlier measurements, which were done with a poor resolution scintillation–Ge(Li) detectors some 20 years ago. In the case of 59Co, existing data show large discrepancies at low energy. Comparisons are presented with the prediction of hybrid and exciton models. While for the (α, xn) type of reactions, reasonably explainable pre-equilibrium contributions are found, there seem to be indications of direct inelastic scattering effects in the (α, αxn) type of reactions.

scholarly journals Soft X-Ray Observations of Supernova Remnants

1974 ◽  
Vol 3 ◽  
pp. 565-572
Author(s):  
J. C. Zarnecki ◽  
J. L. Culhane ◽  
A. C. Fabian ◽  
C. G. Rapley ◽  
R.L.F. Boyd ◽  
...  
Keyword(s):  
Satellite Data ◽  
Supernova Remnants ◽  
Low Energy ◽  
X Ray ◽  
Cassiopeia A ◽  
Upper Limits

AbstractObservations of a number of supernova remnants have been carried out with the low energy X-ray telescope on the Copernicus satellite. Data are presented on the X-ray structure of the remnants Cassiopeia A and Puppis-A. Marginal detections or new upper limits are reported for the remnants IC443, DR4, MSH15-52A, Downes 83, Downes 84 and 3C392.

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