scholarly journals New Results on Excited States in the one-particle one-hole nucleus 56Co measured with MINIBALL detectors

2019 ◽  
Vol 223 ◽  
pp. 01042
Author(s):  
A. Montaner-Pizá ◽  
B. Rubio ◽  
D. Mücher ◽  
S.E.A. Orrigo ◽  
E.C. Simpson ◽  
...  
Keyword(s):  
High Resolution ◽  
Excited States ◽  
Level Scheme ◽  
Incident Energy ◽  
Angular Distributions ◽  
Spin Parity ◽  
Evaporation Reaction ◽  
The One ◽  
Large Improvement ◽  
Fusion Evaporation Reaction

The non-yrast states of the odd-odd nucleus 56Co have been investigated by studying the γ-rays induced in the predominantly fusion-evaporation reaction 56Fe(p,n γ)56Co at an incident energy of 10 MeV. The γ-rays were measured in-beam with four high-resolution MINIBALL-triple germanium (Ge) detectors. The experiment provided excellent data in γ-γ coincidences. The complex level scheme of 56Co was constructed mainly based on the analysis of these γ-γ coincidences. The angular distributions of the γ-rays were also analysed and allowed us to assign spin-parity values to most of the excited states in this nucleus. Despite the extensive work previously done studying the 56Co nucleus, the analysis presented in this work has resulted in a large improvement in the knowledge of its structure.

The Decay of 151Pm to Levels in 151Sm

1973 ◽  
Vol 51 (18) ◽  
pp. 1978-1999 ◽  
Author(s):  
W. B. Cook ◽  
J. C. Waddington ◽  
D. G. Burke ◽  
D. E. Nelson
Keyword(s):  
High Resolution ◽  
Level Scheme ◽  
Gamma Ray ◽  
Energy Levels ◽  
Selection Rules ◽  
Spin Parity ◽  
Coincidence Data ◽  
Parameter Configuration ◽  
Two Parameter

The energy levels of 151Sm have been investigated through a study of the decay of 28.4 h 151Pm. Singles gamma-ray spectra were obtained with high resolution Ge(Li) detectors having volumes of 0.9 and 12 cm3. Two Ge(Li) coincidence spectrometers (37 cm3 – 50 cm3 and 0.9 cm3 – 50 cm3) operated in a two-parameter configuration (4096 × 4096) were employed in collecting coincidence data. Two hundred and seventeen transitions have been incorporated into a level scheme involving 39 levels in 151Sm. On the basis of beta and gamma selection rules, spin–parity assignments have been suggested for most of the levels.

scholarly journals Search for E(5) Symmetry in 102Pd

2019 ◽  
Vol 18 ◽  
pp. 169
Author(s):  
S. F. Ashley ◽  
... Et al.
Keyword(s):  
Excited States ◽  
Decay Curve ◽  
Interacting Boson Model ◽  
Yrast Band ◽  
Evaporation Reaction ◽  
Curve Method ◽  
Shift Experiment ◽  
Recoil Distance ◽  
Boson Model ◽  
Fusion Evaporation Reaction

Lifetimes of the excited states in the yrast band of 102Pd have been deter- mined using the Recoil-Distance Doppler Shift experiment at INFN, Labo- ratori Nazionali di Legnaro. Excited states in 102Pd were populated by the 92Zr(13C,3n)102Pd fusion-evaporation reaction. Lifetimes were deduced using the Differential Decay Curve method and the corresponding B(E2) values were compared to the E(5) critical-point symmetry, and also the U(5) and O(6) limits of the Interacting Boson Model-1. It is evident that 102Pd agrees poorly with the predicted E(5) symmetry but has a very good (and somewhat surprising) agreement with the O(6) limit.

scholarly journals Lifetime measurements in $$^{182}\hbox {Pt}$$ using $$\gamma $$–$$\gamma $$ fast-timing

2021 ◽  
Vol 57 (5) ◽  
Author(s):  
G. Häfner ◽  
A. Esmaylzadeh ◽  
J. Jolie ◽  
J.-M. Régis ◽  
C. Müller-Gatermann ◽  
...  
Keyword(s):  
Excited States ◽  
Theoretical Calculations ◽  
High Accuracy ◽  
Tandem Accelerator ◽  
Lifetime Measurements ◽  
Fast Timing ◽  
Evaporation Reaction ◽  
Configuration Mixing ◽  
The University ◽  
Fusion Evaporation Reaction

AbstractThe level lifetimes of the $$2_1^+$$ 2 1 + and $$4_1^+$$ 4 1 + states in $$^{182}\hbox {Pt}$$ 182 Pt have been re-measured employing the $$\gamma $$ γ –$$\gamma $$ γ fast-timing technique using fast $$\hbox {LaBr}_3$$ LaBr 3 (Ce) scintillators. Excited states in the nucleus of interest were populated by the fusion-evaporation reaction $$^{170}\hbox {Yb}(^{16}\hbox {O},\hbox {4n})^{182}\hbox {Pt}$$ 170 Yb ( 16 O , 4n ) 182 Pt at a beam energy of 87 MeV provided by the FN Tandem accelerator of the University of Cologne. The lifetime of the $$2_1^+$$ 2 1 + state was re-measured with high accuracy to be $$\tau = 563(12)~$$ τ = 563 ( 12 ) ps and resolves inconsistencies from previous measurements. Experimental results are compared to theoretical calculations in the framework of the sd-IBM with and without configuration mixing.

scholarly journals Photochemical R2PI study of chirality and intermolecular forces in supersonic beam

2001 ◽  
Vol 3 (4) ◽  
pp. 223-227 ◽  
Author(s):  
A. Giardini Guidoni ◽  
S. Piccirillo ◽  
D. Scuderi ◽  
M. Satta ◽  
T. M. Di Palma ◽  
...  
Keyword(s):  
Excited States ◽  
Molecular Beam ◽  
Intermolecular Forces ◽  
Excitation Spectra ◽  
Supersonic Molecular Beam ◽  
Spectral Shifts ◽  
Band Origin ◽  
Solvent Molecules ◽  
The One ◽  
Diastereomeric Complexes

One and two-color, mass selected R2PI spectra of theS1←S0transitions in the bare(+)-(R)- 1-phenyl-1-ethanol(ER) and its complexes with different solvent molecules (solv) (-)-(R)-2-butanol(BR) or(+)-(S)-2-butanol(BS), (—)-(R)-2-pentanol (TR) or(+)-(S)-2-pentanol(TS) and(-)-(R)-2-butylamine(AR) or(+)-(S)-2-butylamine(AS), have been recorded after a supersonic molecular beam expansion. The one-color R2PI excitation spectra of the diastereomeric complexes are characterized by significant shifts of their band origin relative to that of bareER. The extent and the direction of these spectral shifts are found to depend upon the structure and the configuration ofsolvand are attributed to different short-range interactions in the ground and excited states of the complexes. In analogy with other diastereomeric complexes, the phenomenological binding energy of the homochiral cluster is found to be greater than that of the heterochiral one. Preliminary measurements of excitation spectrum of(+)-(R)-1-Indanol(IR) is also reported.

scholarly journals Experimental study of nuclei in the vicinity of the “island of inversion” through the fusion-evaporation reaction

2009 ◽  
Vol 80 (3) ◽  
Author(s):  
R. Chakrabarti ◽  
S. Mukhopadhyay ◽  
Krishichayan ◽  
A. Chakraborty ◽  
A. Ghosh ◽  
...  
Keyword(s):  
Experimental Study ◽  
Island Of Inversion ◽  
Evaporation Reaction ◽  
Fusion Evaporation Reaction

scholarly journals Level studies of 73As via 73Ge(p, nγ)73As reaction and density of discrete levels in 73As

2009 ◽  
Vol 24 (2) ◽  
pp. 82-85 ◽  
Author(s):  
Aziz Behkami ◽  
Rohallah Razavi ◽  
Tayeb Kakavand
Keyword(s):  
Proton Beam ◽  
Excited States ◽  
Level Scheme ◽  
Level Density ◽  
Fermi Gas ◽  
Temperature Model ◽  
Nuclear Level Density ◽  
Nuclear Level ◽  
Level Densities ◽  
Experimental Level

The excited states of 73As have been investigated via the 73Ge(p, n?)73As reaction with the proton beam energies from 2.5-4.3 MeV. The parameters of the nuclear level density formula have been determined from the extensive and complete level scheme for 73As. The Bethe formula for the back-shifted Fermi gas model and the constant temperature model are compared with the experimental level densities.

scholarly journals BRRNet: A Fully Convolutional Neural Network for Automatic Building Extraction From High-Resolution Remote Sensing Images

2020 ◽  
Vol 12 (6) ◽  
pp. 1050 ◽  
Author(s):  
Zhenfeng Shao ◽  
Penghao Tang ◽  
Zhongyuan Wang ◽  
Nayyer Saleem ◽  
Sarath Yam ◽  
...  
Keyword(s):  
Remote Sensing ◽  
High Resolution ◽  
Input Image ◽  
Economic Forecast ◽  
Building Extraction ◽  
Remote Sensing Images ◽  
Global Features ◽  
Prediction Module ◽  
Deep Learning Network ◽  
The One

Building extraction from high-resolution remote sensing images is of great significance in urban planning, population statistics, and economic forecast. However, automatic building extraction from high-resolution remote sensing images remains challenging. On the one hand, the extraction results of buildings are partially missing and incomplete due to the variation of hue and texture within a building, especially when the building size is large. On the other hand, the building footprint extraction of buildings with complex shapes is often inaccurate. To this end, we propose a new deep learning network, termed Building Residual Refine Network (BRRNet), for accurate and complete building extraction. BRRNet consists of such two parts as the prediction module and the residual refinement module. The prediction module based on an encoder–decoder structure introduces atrous convolution of different dilation rates to extract more global features, by gradually increasing the receptive field during feature extraction. When the prediction module outputs the preliminary building extraction results of the input image, the residual refinement module takes the output of the prediction module as an input. It further refines the residual between the result of the prediction module and the real result, thus improving the accuracy of building extraction. In addition, we use Dice loss as the loss function during training, which effectively alleviates the problem of data imbalance and further improves the accuracy of building extraction. The experimental results on Massachusetts Building Dataset show that our method outperforms other five state-of-the-art methods in terms of the integrity of buildings and the accuracy of complex building footprints.

scholarly journals Study of neutron-deficient mercury isotopes Preliminary results on 189Hg

2019 ◽  
Vol 223 ◽  
pp. 01072
Author(s):  
Irene Zanon ◽  
Marco Siciliano ◽  
Alain Goasduff ◽  
Philipp R. John
Keyword(s):  
Shape Coexistence ◽  
Shape Transition ◽  
Isotopic Chain ◽  
Preliminary Results ◽  
Mercury Isotopes ◽  
Evaporation Reaction ◽  
Fusion Evaporation Reaction

The mercury isotopic chain is depicted as one of the best fields to observe many phenomena related to collectivity evolution as, for instance, shape transition, shape coexistence or shape staggering. In this context, the 189Hg presents several interesting aspects and is still relatively unexplored. The nucleus has been studied at the Laboratori Nazionali di Legnaro using a fusion-evaporation reaction and the γ rays emitted have been detected by the GALILEO array, coupled with Neutron Wall and the GALILEO plunger. The presorting and the preliminary results are presented.

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