X-ray, heat excess and He-4 in the D/Pd system (vol 435, pg 113, 1997)

The energy balance between heat excess and He-4 in the gas phase has been found to be reasonably satisfied even if the low levels of He-4 do not give the necessary confidence to state definitely that we are dealing with the fusion of deuterons to give He-4. In the melted cathode, the data of which are reported, no He-4 was found at the achieved sensitivity. X-ray film, positioned at 50 mm from the cell, roughly gave the image of the cathode through spots. Extended considerations have been made to explain this evidence on the basis of the bundle nature of the cathode. From these considerations, the energy of the radiation and the total energy associated to it have been extimated as 89 keV and 12 kJ, respectively. This value is approximate to 0.5% of the: energy measured by calorimetry in the same interval of time. The highest values of energy and excess power are 8.3 MJ and 10 W, respectively. (C) 1998 Elsevier Science S.A. All rights reserved

CALORIMETRIC AND NUCLEAR BY-PRODUCT MEASUREMENTS IN ELECTROCHEMICAL CONFINEMENT OF DEUTERIUM IN PALLADIUM

We present the results of a new experiment with our multicell set-up implemented with mass spectrometric measurements of He-4 and a highly improved neutron detector. The excess heat measured is comparable with the results of other laboratories, but no neutrons were found and the tritium excess was lower than expected from the power excess. He-4 has been measured in the electrolysis gases and a tentative correlation of He-4 with excess power is presented and discussed

Production and assembly of the ALICE Silicon Drift Detectors

none23The ALICE experiment at the LHC will study collisions of heavy-ions at a centre-of-mass energy 5.5TeV per nucleon. The main aim of the experiment is to study in detail the behaviour of nuclear matter at high densities and temperatures, in view of probing deconfinement and chiral symmetry restoration. Silicon Drift Detectors (SDDs) have been selected to equip the two intermediate layers of the ALICE Inner Tracking System (ITS) [ALICE Collaboration, Technical Design Report, CERN/LHCC 99–12], since they couple a very good multi-track capability with dE/dx information and excellent spatial resolution as described in [E. Gatti, P. Rehak, Nucl. Instr. and Meth. A 225 (1984) 608; S. Beolé, et al., Nucl. Instr. and Meth. A 377 (1996) 393; S. Beolé, et al., Il Nuovo Cimento 109A (9) (1996)]. In this paper we describe the different components of the SDD system as well as the different procedure of the system assembly.http://dx.doi.org/10.1016/j.nima.2006.09.027noneS.ANTINORI; S.COLI; E.CRESCIO; D.FALCHIERI; R.ARTECHE DIAZ; S. DI LIBERTO; GABRIELLI A.; G.GIRAUDO; P.GIUBELLINO; S.MARTOIU; G.MASETTI; G.MAZZA; M.A.MAZZONI; F.MEDDI; A.RASHEVSKY; L.RICCATI; A.RIVETTI; L.SIMONETTI; L.TOSCANO; F.TOSELLO; G.M.URCIUOLI; A.VACCHI; R.WHEADONS.ANTINORI; S.COLI; E.CRESCIO; D.FALCHIERI; R.ARTECHE DIAZ; S. DI LIBERTO; GABRIELLI A.; G.GIRAUDO; P.GIUBELLINO; S.MARTOIU; G.MASETTI; G.MAZZA; M.A.MAZZONI; F.MEDDI; A.RASHEVSKY; L.RICCATI; A.RIVETTI; L.SIMONETTI; L.TOSCANO; F.TOSELLO; G.M.URCIUOLI; A.VACCHI; R.WHEADO

Strangeness physics programs by S-2S at J-PARC

In the K1.8 beam-line at Hadron Experimental Facility of J-PARC, a new magnetic spectrometer S-2S is being installed. S-2S was designed to achieve a high momentum resolution of Δp/p = 6 × 10−4 in FWHM. Several strangeness-physics programs which require the high resolution will be realized by S-2S. The present article introduces J-PARC E70 (missing-mass spectroscopy of Ξ12Be) and E94 (missing-mass spectroscopy of Λ7Li, Λ10B, and Λ12C) experiments

Measurement of the generalized spin polarizabilities of the neutron in the low-Q2Q^2 region

International audienceUnderstanding the nucleon spin structure in the regime where the strong interaction becomes truly strong poses a challenge to both experiment and theory. At energy scales below the nucleon mass of about 1 GeV, the intense interaction among the quarks and gluons inside the nucleon makes them highly correlated. Their coherent behaviour causes the emergence of effective degrees of freedom, requiring the application of non-perturbative techniques such as chiral effective field theory1. Here we present measurements of the neutron’s generalized spin polarizabilities that quantify the neutron’s spin precession under electromagnetic fields at very low energy-momentum transfer squared down to 0.035 GeV2. In this regime, chiral effective field theory calculations2,3,4 are expected to be applicable. Our data, however, show a strong discrepancy with these predictions, presenting a challenge to the current description of the neutron’s spin properties

J/ψJ/\psi production and nuclear effects in p-Pb collisions at SNN\sqrt{S_{NN}} = 5.02 TeV

Inclusive J/$\psi$ production has been studied with the ALICE detector in p-Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV at the CERN LHC, in the rapidity domains 2.03 < y$_{cms}$ < 3.53 and −4.46 < y$_{cms}$ < −2.96, down to zero transverse momentum. The J/$\psi$ measurement is performed in the Muon Spectrometer through the $\mu^+\mu^−$ decay mode. In this Letter, the J/$\psi$ production cross section and the nuclear modification factor R$_{pPb}$ for the rapidities under study are presented. While at forward rapidity a suppression of the J/$\psi$ yield with respect to binary-scaled pp collisions is observed, in the backward region no suppression is present. The ratio of the forward and backward yields is also shown differentially in rapidity and transverse momentum. Theoretical predictions based on nuclear shadowing, as well as on models including, in addition, a contribution from partonic energy loss, are in fair agreement with the experimental results.Inclusive J/$\psi$ production has been studied with the ALICE detector in p-Pb collisions at the nucleon-nucleon center of mass energy $\sqrt{s_{\rm NN}}$ = 5.02 TeV at the CERN LHC. The measurement is performed in the center of mass rapidity domains $2.03<y_{\rm cms}<3.53$ and $-4.46<y_{\rm cms}<-2.96$, down to zero transverse momentum, studying the $\mu^+\mu^-$ decay mode. In this paper, the J/$\psi$ production cross section and the nuclear modification factor $R_{\rm pPb}$ for the rapidities under study are presented. While at forward rapidity, corresponding to the proton direction, a suppression of the J/$\psi$ yield with respect to binary-scaled pp collisions is observed, in the backward region no suppression is present. The ratio of the forward and backward yields is also measured differentially in rapidity and transverse momentum. Theoretical predictions based on nuclear shadowing, as well as on models including, in addition, a contribution from partonic energy loss, are in fair agreement with the experimental results