Showing papers by "Matthew Jones published in 1995"
TL;DR: In this paper, the rotational band built on a state at 1435 keV identifies the band head as the best candidate for a harmonic double-phonon, which has been observed so far.
Abstract: The neutron-rich ${}^{106}$Mo nucleus has been studied by prompt \ensuremath{\gamma}-ray spectroscopy following the spontaneous fission of ${}^{248}$Cm. The characteristics of the rotational band built on a state at 1435 keV identifies the band head as the best candidate for a harmonic double-phonon ${K}^{\ensuremath{\pi}}{\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}4}^{+}$ \ensuremath{\gamma}-vibrational state observed so far.
62 citations
TL;DR: Results on the search for the top quark in {ital p{bar p}} collisions at {radical}{ital s} =1.8 TeV with an integrated luminosity of 13.5 TeV are presented.
Abstract: We present results on the search for the top quark in {ital p{bar p}} collisions at {radical}{ital s} =1.8 TeV with an integrated luminosity of 13.5{plus_minus}1.6 pb{sup {minus}1}. We have considered {ital t{bar t}} production in the standard model using electron and muon dilepton decay channels ({ital t{bar t}}{r_arrow}{ital e}{mu}+jets, {ital ee}+jets, and {mu}{mu}+jets) and single-lepton decay channels ({ital t{bar t}}{r_arrow}{ital e}+jets and {mu}+jets) with and without tagging of {ital b} quark jets. An analysis of these data optimized for top quark masses below 140 GeV/{ital c}{sup 2} gives a lower top quark mass limit of 128 GeV/{ital c}{sup 2}. An analysis optimized for higher top quark masses yields 9 events with an expected background of 3.8{plus_minus}0.9. If we assume that the excess is due to {ital t{bar t}} production, and assuming a top quark mass of 180 GeV/{ital c}{sup 2}, we obtain a cross section of 8.2{plus_minus}5.1 pb.
55 citations
11 Nov 1995-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this article, triple angular correlations between γ rays following spontaneous fission of 248 Cm were studied using the EUROGAM array, and the results, for transitions in even-even fission product nuclei, agree with predictions of angular correlation theory.
Abstract: Triple angular correlations between γ rays following spontaneous fission of 248 Cm are studied using the EUROGAM array. Results, for transitions in even-even fission-product nuclei, agree with predictions of angular correlation theory. Efficient detector systems combined with new analysis techniques offer for the first time a convenient tool to determine multipolarities of prompt γ transitions in the fission-product nuclei.
17 citations
TL;DR: In this paper, an extended level scheme is proposed, which is discussed in terms of single-particle excitations and collective quadrupole and octupole vibrations coupled to them, and the possible presence of octuole deformation is considered.
10 citations
Journal Article•
TL;DR: In this article, the rotational band built on a state at 1435 keV identifies the band head as the best candidate for a harmonic double-phonon K-pi = 4(+) gamma-vibrational state observed so far.
Abstract: The neutron-rich Mo-106 nucleus has been studied by prompt gamma-ray spectroscopy following the spontaneous fission of Cm-248. The characteristics of the rotational band built on a state at 1435 keV identifies the band head as the best candidate for a harmonic double-phonon K-pi = 4(+) gamma-vibrational state observed so far.
1 citations