22 research outputs found

    Band termination in the N=Z Odd-Odd Nucleus 46V

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    High spin states in the odd-odd N=Z nucleus 46V have been identified. At low spin, the T=1 isobaric analogue states of 46Ti are established up to I = 6+. Other high spin states, including the band terminating state, are tentatively assigned to the same T=1 band. The T=0 band built on the low-lying 3+ isomer is observed up to the 1f7/2-shell termination at I=15. Both signatures of a negative parity T=0 band are observed up to the terminating states at I = 16- and I = 17-, respectively. The structure of this band is interpreted as a particle-hole excitation from the 1d3/2 shell. Spherical shell model calculations are found to be in excellent agreement with the experimental results.Comment: 5 pages, 4 figure

    Excited States in 52Fe and the Origin of the Yrast Trap at I=12+

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    Excited states in 52Fe have been determined up to spin 10\hbar in the reaction 28Si + 28Si at 115 MeV by using \gamma-ray spectroscopy methods at the GASP array. The excitation energy of the yrast 10+ state has been determined to be 7.381 MeV, almost 0.5 MeV above the well known \beta+-decaying yrast 12+ state, definitely confirming the nature of its isomeric character. The mean lifetimes of the states have been measured by using the Doppler Shift Attenuation method. The experimental data are compared with spherical shell model calculations in the full pf-shell.Comment: 9 pages, RevTeX, 7 figures include

    Difficult tracheal intubation in neonates and infants. NEonate and Children audiT of Anaesthesia pRactice IN Europe (NECTARINE): a prospective European multicentre observational study

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    Background: Neonates and infants are susceptible to hypoxaemia in the perioperative period. The aim of this study was to analyse interventions related to anaesthesia tracheal intubations in this European cohort and identify their clinical consequences. Methods: We performed a secondary analysis of tracheal intubations of the European multicentre observational trial (NEonate and Children audiT of Anaesthesia pRactice IN Europe [NECTARINE]) in neonates and small infants with difficult tracheal intubation. The primary endpoint was the incidence of difficult intubation and the related complications. The secondary endpoints were the risk factors for severe hypoxaemia attributed to difficult airway management, and 30 and 90 day outcomes. Results: Tracheal intubation was planned in 4683 procedures. Difficult tracheal intubation, defined as two failed attempts of direct laryngoscopy, occurred in 266 children (271 procedures) with an incidence (95% confidence interval [CI]) of 5.8% (95% CI, 5.1e6.5). Bradycardia occurred in 8% of the cases with difficult intubation, whereas a significant decrease in oxygen saturation (SpO2<90% for 60 s) was reported in 40%. No associated risk factors could be identified among comorbidities, surgical, or anaesthesia management. Using propensity scoring to adjust for confounders, difficult anaesthesia tracheal intubation did not lead to an increase in 30 and 90 day morbidity or mortality. Conclusions: The results of the present study demonstrate a high incidence of difficult tracheal intubation in children less than 60 weeks post-conceptual age commonly resulting in severe hypoxaemia. Reassuringly, the morbidity and mortality at 30 and 90 days was not increased by the occurrence of a difficult intubation event. Clinical trial registration: NCT02350348

    7th Drug hypersensitivity meeting: part two

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    Band terminations in the nucleus 46Ti

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    High-spin states in 46Ti have been investigated with the reaction 28Si(24Mg,\u3b12p) at 100 MeV, using the GASP \u3b3-ray array and the charged-particle detector ISIS. The positive parity yrast sequence has been observed up to the 14+ terminating state and several high-energy transitions have been established above the termination state. Both the signatures of a negative parity band have been observed up to the 16- and 17- terminating states, plus one more transition from an 18- state at 19.086 MeV excitation. The observed states are interpreted within the frame of large scale shell model calculations in the full pf space (positive parity) and as particle-hole excitations from the d3/2 shell (negative parity)

    Rotational bands and shell model in the 1f7/2

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    The nuclei in the middle of the 1f(7/2) shell are shown to have rotational features. Progresses made recently at GASP in their spectroscopy, and in particular in lifetime measurement, are reviewed. The agreement of Large Scale Shell Model calculations with experiments is in general excellent. As an example, the case of Cr-50 is illustrated where a observed bandcrossing is discussed as well as its connection with recent Coulomb Energy Differences data in the Fe-50-Cr-50 mirror pair

    Lifetime Measurements of Spherical and Deformed States in 1f7/2 Nuclei

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    Lifetimes have been determined using the Doppler Shift Attenuation Method in the N ? Z nuclei 46 V and 48 V nuclei, populated with the reaction 28 Si on 24 Mg at 115 MeV and 24 Mg on 28 Si at 100 MeV using Au and Pb backed targets. The coexistence of spherical and deformed states in the middle of the 1f 7/2 shell is discussed. The B(E2) and B(M1) reduced rates agree very well with large scale shell model predictions

    Coulomb Energy Differences in T=1T = 1 Mirror Rotational Bands in 50Fe^{50}Fe and 50Cr^{50}Cr

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    none49Gamma rays from the N = Z-2 nucleus 50Fe have been observed, establishing the rotational ground state band up to the state Jπ = 11+ at 6.994 MeV excitation energy. The experimental Coulomb energy differences, obtained by comparison with the isobaric analog states in its mirror 50Cr, confirm the qualitative interpretation of the backbending patterns in terms of successive alignments of proton and neutron pairs. A quantitative agreement with experiment has been achieved by exact shell model calculations, incorporating the differences in radii along the yrast bands, and properly renormalizing the Coulomb matrix elements in the pf model space.noneS.M. Lenzi;N. Mărginean;D. Napoli;C. Ur;A. Zuker;G. de Angelis;A. Algora;M. Axiotis;D. Bazzacco;N. Belcari;M. Bentley;P. Bizzeti;A. Bizzeti-Sona;F. Brandolini;P. von Brentano;D. Bucurescu;J. Cameron;C. Chandler;M. De Poli;A. Dewald;H. Eberth;E. Farnea;A. Gadea;J. Garces-Narro;W. Gelletly;H. Grawe;R. Isocrate;D. Joss;C. Kalfas;T. Klug;T. Lampman;S. Lunardi;T. Martínez;G. Martínez-Pinedo;R. Menegazzo;J. Nyberg;Zs. Podolyak;A. Poves;R. Ribas;C. Rossi Alvarez;B. Rubio;J. Sánchez-Solano;P. Spolaore;T. Steinhardt;O. Thelen;D. Tonev;A. Vitturi;W. von Oertzen;M. WeiszflogLenzi, SILVIA MONICA; N., Mărginean; D., Napoli; C., Ur; A., Zuker; G., de Angelis; A., Algora; M., Axiotis; D., Bazzacco; N., Belcari; M., Bentley; P., Bizzeti; A., Bizzeti Sona; Brandolini, Franco; P., von Brentano; D., Bucurescu; J., Cameron; C., Chandler; M., De Poli; A., Dewald; H., Eberth; E., Farnea; A., Gadea; J., Garces Narro; W., Gelletly; H., Grawe; R., Isocrate; D., Joss; C., Kalfas; T., Klug; T., Lampman; Lunardi, Santo; T., Martínez; G., Martínez Pinedo; R., Menegazzo; J., Nyberg; Podolyak, Z. s.; A., Poves; R., Ribas; C., Rossi Alvarez; B., Rubio; J., Sánchez Solano; P., Spolaore; T., Steinhardt; O., Thelen; D., Tonev; Vitturi, Andrea; W., von Oertzen; M., Weiszflo
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