292 citations · 927 across the 14 of their papers we have counts for
14 papers
Level density and -ray strength in Si
M. Guttormsen, E. Melby, J. Rekstad +4
A method to extract simultaneously level densities and -ray transmission coefficients has for the first time been tested on light nuclei utilizing the Si(He,$αγ)^{27}…
Level densities and -strength functions in Sm
S. Siem, M. Guttormsen, K. Ingeberg +4
The level densities and -strength functions of the weakly deformed Sm and Sm nuclei have been extracted. The temperature versus excitation energy curve, derived…
Heat capacity and pairing transition in nuclei
M. Guttormsen, M. Hjorth-Jensen, E. Melby +3
A simple model based on the canonical-ensemble theory is outlined for hot nuclei. The properties of the model are discussed with respect to the Fermi gas model and the breaking of…
Observation of the scissors mode in the quasicontinuum
A. Schiller, M. Guttormsen, E. Melby +3
The experimental resonance parameters of the pygmy resonance in rare earth nuclei are compared to global parameters of the scissors-mode states. It is argued that the pygmy resonan…
Thermal and electromagnetic properties of 166-Er and 167-Er
E. Melby, M. Guttormsen, J. Rekstad +3
The primary gamma-ray spectra of 166-Er and 167-Er are deduced from the (3-He,alpha gamma) and (3-He,3-He' gamma) reaction, respectively, enabling a simultaneous extraction of the…
Gamma-ray strength function and pygmy resonance in rare earth nuclei
A. Voinov, M. Guttormsen, E. Melby +3
The gamma-ray strength function for gamma energies in the 1-7 MeV region has been measured for 161,162-Dy and 171,172-Yb using the (3-He,alpha gamma) reaction. Various models are t…
Entropy of thermal quasiparticles in nuclei
M. Guttormsen, M. Hjorth-Jensen, E. Melby +3
Information on level density for nuclei with mass numbers A = 20 - 250 is deduced from discrete low-lying levels and neutron resonance data. The odd-mass nuclei exhibit in general…
Level density and thermal properties in rare earth nuclei
A. Schiller, M. Guttormsen, M. Hjorth-Jensen +3
A convergent method to extract the nuclear level density and the gamma-ray strength function from primary gamma-ray spectra has been established. Thermodynamical quantities have be…
Level density and gamma strength function in 162-Dy from inelastic 3-He scattering
A. Schiller, M. Guttormsen, E. Melby +2
Complementary measurements have been performed for the level density and gamma strength function in 162-Dy using inelastic 3-He scattering. Comparing these results to previous meas…
Entropy in hot ^{161,162}Dy and ^{171,172}Yb nuclei
M. Guttormsen, A. Bjerve, M. Hjorth-Jensen +5
The density of accessible levels at low spin in the (^3He,αγ) reaction has been extracted for the ^{161,162}Dy and ^{171,172}Yb nuclei. The entropy of the even-odd and even-even nu…
Extraction of level density and gamma strength function from primary gamma spectra
A. Schiller, L. Bergholt, M. Guttormsen +3
We present a new iterative procedure to extract the level density and the gamma strength function from primary gamma spectra for energies close up to the neutron binding energy. Th…
Energy shifted level densities in the rare earth region
M. Guttormsen, M. Hjorth-Jensen, E. Melby +3
The density of accessible levels at low spin in the (3-He,alpha gamma) reaction has been extracted for the 161,162-Dy and 171,172-Yb nuclei. The energy shift between the level dens…
Critical temperature for quenching of pair correlations
A. Schiller, A. Bjerve, M. Guttormsen +7
The level density at low spin in the 161,162-Dy and 171,172-Yb nuclei has been extracted from primary gamma rays. The nuclear heat capacity is deduced within the framework of the c…
Observation of Thermodynamical Properties in the Dy, Er and Yb Nuclei
E. Melby, L. Bergholt, M. Guttormsen +7
The density of accessible levels in the (He,) reaction has been extracted for the Dy, Er and Yb nuclei. The nuclear temperature is measured as a fun…