Nuclear excitations within microscopic EDF approaches : pairing and temperature effects on the dipole response

In the present work, the isovector dipole responses, both in the resonance region and in the low-energy sector, are investigated using the microscopic nuclear Energy Density Functionals (EDFs). The self-consistent QRPA model based on Skyrme Hartree Fock BCS approach is applied to study the evolution of the isovector dipole strength by increasing neutron number and temperature. First, the isovector dipole strength and excitation energies are investigated for the Ni isotopic chain at zero temperature. The evolution of the low-energy dipole strength is studied as a function of the neutron number. In the second part, the temperature dependence of the isovector dipole excitations is studied using the self-consistent finite temperature QRPA, below and above the critical temperatures. It is shown that new excited states become possible due to the thermally occupied states above the Fermi level, and opening of the new excitations channels. In addition, temperature leads to fragmentation of the low-energy strength around the neutron separation energies, and between 9 and 12 MeV. We find that the cumulative sum of the strength below E 64 12 MeV decreases in open-shell nuclei due to the vanishing of the pairing correlations as temperature increases up to T= 1 MeV. The analysis of the transition densities in the low-energy region shows that the proton and neutron transition densities display a mixed pattern: both isoscalar and isovector motion of protons and neutrons are obtained inside nuclei, while the neutron transition density is dominant at the surface region

PENGGUNAAN BAHAN AJAR DALAM PEMBELAJARAN IPS SMP BERBASIS KONTEKSTUAL PADA SISWA KELAS VII SMP NEGERI 1 PURWANTORO WONOGIRI

This research aim: 1. Describe how teacher use the teaching material in Social Subject in Junior High School 1 Purwantoro up until now. 2. Describe the constraint and how to overcome it. 3. Describe the usage result of the teaching material in study of Social for Junior High School in Purwantoro 1 Junior High School. This research takes place in Purwantoro 1 Junior High School, Wonogiri Regency. This research metod is descriptive research of qualitative. This research wants to describe and expose the usage of teaching material in study of Contextual Based Social for Junior High School in Purwantoro 1 Junior High School according to the condition and the situation at the moment. Strategies utilized in this research are interviewing, question airing, observing, and documenting. The result of this research concludes that teaching material in Study of Contextual Based Social for Junior High School in Purwantoro 1 Junior High School, evaluated from its form covered : a). Printed teaching material consist. b). Heard Teaching Material (audio) consist. c) Visual and Listening Teaching Material consist. d). Interactive teaching material like compact disc (doesn’t yet able to be executed) e). Environment teaching material (geography, history, and economics) still applied in class theory level. Current result achieved from the use of teaching materials in learning of Social for Junior High School in Purwantoro Junior High School are: 1) Provide better learning environment for teachers and students. 2) Help students and make them easy to learn Social. 3) Improve student’s learning achievement proved with 79,895 average score (it exceeds current KKM set by the teachers: 72) Keywords : The Use of, Teaching Materials of Contextual Based Social for Junior High School

Interplay of quasiparticle-vibration coupling and pairing correlations on β-decay half-lives

The nuclear \u3b2-decay half-lives of Ni and Sn isotopes, around the closed shell nuclei78Ni and132Sn, are investigated by computing the distribution of the Gamow\u2013Teller strength using the Quasiparticle Random Phase Approximation (QRPA) with quasiparticle-vibration coupling (QPVC), based on ground-state properties obtained by Hartree\u2013Fock\u2013Bogoliubov (HFB) calculations. We employ the effective interaction SkM\u204eand a zero-range effective pairing force. The half-lives are strongly reduced by including the QPVC. We study in detail the effects of isovector (IV) and isoscalar (IS) pairing. Increasing the IV strength tends to increase the lifetime for nuclei in the proximity of, but lighter than, the closed-shell ones in QRPA calculations, while the effect is significantly reduced by taking into account the QPVC. On the contrary, the IS pairing mainly plays a role for nuclei after the shell closure. Increasing its strength decreases the half-lives, and the effect at QRPA and QRPA+QPVC level is comparable. The effect of IS pairing is particularly pronounced in the case of the Sn isotopes, where it turns out to be instrumental to obtain good agreement with experimental data

First observation of a shape isomer and a low-lying strongly-coupled prolate band in neutron-deficient semi-magic 187Pb

Prompt and delayed γ-ray spectroscopy of the neutron-deficient, semi-magic isotope 187Pb has been performed using the recoil-decay and isomer-decay tagging techniques at the Argonne Gas-Filled Analyzer. A new 5.15(15)-μs isomeric state at only 308 keV above the spherical 3/2− ground state is identified and classified as a shape isomer. A strongly-coupled band is observed on top of the isomer, which is nearly identical to the one built on the prolate 7/2−[514] Nilsson state in the isotone 185Hg. Based on this similarity and on the result of the potential-energy surface calculations, the new isomer in 187Pb is proposed to originate from the same configuration. The retarded character of the 308-keV (7/2−)→3/2gs− transition with a deduced B(E2)=5.6(2)×10−4 W.u. can be well explained by the significant difference between the prolate parent and spherical daughter configurations, leading to the shape isomerism. The excitation energy of the isomer is surprisingly low, being roughly half of the excitation energies of the known 0+ intruder bandheads in the neighboring 186,188Pb isotopes. The combined results of the present work and the previous α-decay and laser spectroscopy studies present evidence for triple shape coexistence at low energy in the negative-parity configurations of 187Pb, which is well reproduced by the potential-energy surface calculations

Search for leptophobic Z ' bosons decaying into four-lepton final states in proton-proton collisions at root s=8 TeV

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Search for black holes and other new phenomena in high-multiplicity final states in proton-proton collisions at root s=13 TeV

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Searches for invisible decays of the Higgs boson in pp collisions at root S=7, 8, and 13 TeV

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Measurements of differential production cross sections for a Z boson in association with jets in pp collisions at root s=8 TeV

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Search for high-mass diphoton resonances in proton-proton collisions at 13 TeV and combination with 8 TeV search

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Search for heavy resonances decaying into a vector boson and a Higgs boson in final states with charged leptons, neutrinos, and b quarks

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