A full quantal theory of one-neutron halo breakup reactions

We present a theory of one-neutron halo breakup reactions within the framework of post-form distorted wave Born approximation wherein pure Coulomb, pure nuclear and their interference terms are treated consistently in a single setup. This formalism is used to study the breakup of one-neutron halo nucleus 11Be on several targets of different masses. We investigate the role played by the pure Coulomb, pure nuclear and the Coulomb-nuclear interference terms by calculating several reaction observables. The Coulomb-nuclear interference terms are found to be important for more exclusive observables.Comment: 22 pages latex, 9 figures, submitted to Phy. Rev.

SPIRAL2 RFQ prototype - First results

JACoW web site MOPCH103International audienceThe SPIRAL2 RFQ is designed to accelerate either 5 mA deuteron beam (Q/A=1/2) or a 1 mA of q/A=1/3 particle up to 0.75 MeV/A at 88 MHz. It is a CW machine which has to show stable operation, provide the required availability and reduce losses to a minimum in order to minimize the activation constraints. Extensive modelisation was done to ensure a good vane position under RF. The prototype of this 4-vane RFQ was built and tested in INFN-LNS Catania and then in IN2P3-LPSC Grenoble. It allowed us to measure the vacuum quality, the RF field by X-ray measurements, the cavity displacement and the real vane displacement during the RF injection. Different techniques were used, including an innovative CCD measurement with a 0.8 μm precision. This paper outlines the different results

Coulomb-nuclear interference in the breakup of 11^{11}Be

Within a theory of breakup reactions formulated in the framework of the post form distorted wave Born approximation, we calculate contributions of the pure Coulomb and the pure nuclear breakup as well as those of their interference terms to a variety of cross sections in breakup reactions of the one-neutron halo nucleus $^{11}$Be on a number of target nuclei. In contrast to the assumption often made, the Coulomb-nuclear interference terms are found to be non-negligible in case of exclusive cross sections of the fragments emitted in this reaction on medium mass and heavy target nuclei. The consideration of the nuclear breakup leads to a better description of such data.Comment: 9 pages, latex, 2 figures, to be published in Phys. Rev. C (Rapid Communication

RF and cryogenic tests of the first beat 0.12 SPIRAL2 cryomodule

THP009International audienc

How does finasteride affect time-dependent modulatory effect of morphine-induced analgesia

Finasterid, testosteronu dihidrotestosterona dönüştüren 5α-redüktaz enziminin inhibitörüdür. Bu çalışmanın amacı, finasteridin morfinin analjezik etkisini zaman bağımlı olarak nasıl etkilediğini araştırmaktır. Deneylerde 12 saat aydınlık/12 saat karanlık döngüsü ile senkronize edilmiş 25-40 gram ağırlığında albino erkek fareler ve 55 ± 0.5ºC’de sıcak plaka testi kullanılmıştır. Tüm gruplarda deneyler, ışıklar yandıktan sonra 1., 5., 9., 13.,17. ve 21. saatlerde yapılmıştır. Bazal ağrı duyarlılığı ve morfinin analjezik etkisi, onar farelik gruplarda sıcak plaka testinden 30 dakika önce s.c. 10 mg/kg serum fizyolojik ve 10 mg/kg morfin uygulanarak saptanmıştır. Sıcak plaka testinden 50 dakika önce s.c. 15 mg/kg finasterid uygulanarak tek başına analjezik etkisi olup olmadığı araştırılmıştır. Finasterid ve morfin etkileşimini incelemek için aynı saatlerde, sıcak plaka testinden 50 dakika önce 15 mg/kg finasterid ve 30 dakika önce 10 mg/kg morfin cilt altı uygulanmıştır. Deney sonuçlarının standardizasyonu açısından 3 saniyeden daha kısa süreli yanıtlar “spontan yanıt” olarak değerlendirilmiş ve hesaplamalara dahil edilmemişlerdir. Farelerde yanık hasarı oluşturmamak için maksimum yanıt süresi 45 saniye olarak kabul edilmiştir. Mevsim değişiklerinden etkilenmemek için tüm deneyler Haziran ve Temmuz aylarında yapılmıştır. Güniçinde 6 değişik zamanda elde edilen data ortalama ± standart hata şeklinde ifade edilmiştir. Elde edilen data gereken yerlerde student t-test, varyans analizi (ANOVA) veya Kruskal Wallis varyans analizi ile değerlendirilmiştir. Finasteridin morfin yanıtlarına etkisinin aktivite periyodunda istirahat periyoduna nazaran, özellikle ışıklar yandıktan sonra 13. ve 21. saatlerde, çok daha belirgin olduğu görülmüştür. Bulgularımız, finasteridin morfinin antinosiseptif etkisini potansiye ettiğini ve aynı zamanda bu potansiyasyonun güniçi zaman bağımlılığı gösterdiğini işaret etmektedir.Finasteride inhibits 5α-reductase which converts testosterone to dihydrotestosterone. The aim of this study is to evaluate how finasteride affects the analgesic effect of morphine time-dependently. Local bred albino male mice (25-40 gram) synchronized with a standard light-dark regimen (12hours:12hours Light:Dark, lights on 08:00) were used. All experiment groups include 10-12 mice and were tested at six time points of the day as 1, 5, 9, 13, 17 and 21 hours after lights on. All drugs were administered subcutaneously. Basal pain sensitivity (saline; 10 mg/kg) and morphine-induced analgesia (10 mg/kg) were determined 30 minutes before hot-plate test (55 ± 0.5ºC). To test the administration time-dependent interaction, a third group of animals were injected with a predetermined dose of finasteride (15 mg/kg) 20 minutes before morphine and response latencies were tested. Response latencies shorter than 3 seconds were regarded as spontaneous and excluded. To avoid heat injury, animals not responding within 45 seconds were removed from the hot-plate. To avoid the seasonal variations all experiments were performed in June and July. Data analyzed by ANOVA or Kruskal Wallis and student t-test where necessary. The results of this study indicate that there is time-dependent interaction between finasteride and morphine-induced analgesia. In the dark period, especially 13 and 21 hours after lights on, finasteride enhanced morphine-induced analgesia

AGATA-Advanced GAmma Tracking Array

AGATA CollaborationThe Advanced GAmma Tracking Array (AGATA) is a European project to develop and operate the next generation gamma-ray spectrometer. AGATA is based on the technique of gamma-ray energy tracking in electrically segmented high-purity germanium crystals. This technique requires the accurate determination of the energy, time and position of every interaction as a gamma ray deposits its energy within the detector volume. Reconstruction of the full interaction path results in a detector with very high efficiency and excellent spectral response. The realisation of gamma-ray tracking and AGATA is a result of many technical advances. These include the development of encapsulated highly segmented germanium detectors assembled in a triple cluster detector cryostat, an electronics system with fast digital sampling and a data acquisition system to process the data at a high rate. The full characterisation of the crystals was measured and compared with detector-response simulations. This enabled pulse-shape analysis algorithms, to extract energy, time and position, to be employed. In addition, tracking algorithms for event reconstruction were developed. The first phase of AGATA is now complete and operational in its first physics campaign. In the future AGATA will be moved between laboratories in Europe and operated in a series of campaigns to take advantage of the different beams and facilities available to maximise its science output. The paper reviews all the achievements made in the AGATA project including all the necessary infrastructure to operate and support the spectrometer. (C) 2011 Elsevier B.V. All rights reserved.AGATA and this work is supported by the European funding bodies and the EU Contract RII3-CT-2004-506065, the German BMBF under Grants 06K-167 and 06KY205I, the Swedish Research Council and the Knut and Alice Wallenberg Foundation, UK EPSRC Engineering and Physical Sciences Research Council, UK STFC Science and Technology Facilities Council, AWE plc, Scientific and Technological Research Council of Turkey (Proj. nr. 106T055) and Ankara University (BAP Proj. nr. 05B4240002), the Polish Ministry of Science and Higher Education under Grant DPN/N190/AGATA/2009, the Spanish MICINN under grants FPA2008-06419 and FPA2009-13377-C02-02, the Spanish Consolider-Ingenio 2010 Programme CPAN (contract number CSD2007-00042) the Generalitat Valenciana under Grant PROMETEO/2010/101, and research performed in the frame of the GSI-IN2P3 collaboration agreement number 02-42. MICINN, Spain, and INFN, Italy, through the AIC10-D-000568 bilateral action.Peer Reviewe