61 research outputs found
Activities of the medical physics laboratory at the Physics department of Milan University
No full textStructure of the low lying states in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Ga</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>69</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>through the (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mo>,</mml:mo><mml:mi> </mml:mi><mml:mrow><mml:msup><mml:mrow><mml:mi>p</mml:mi></mml:mrow><mml:mrow><mml:mo>′</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mi>γ</mml:mi></mml:math>) reaction
No full text
Some Odd <i>Z</i> Nuclei in the 63 ≤ <i>A</i> ≤ 89 Mass Region in the Framework of the Intermediate Coupling Model
No full text The level structures of the nuclei 63Cu, 69Ga, 75As, 79Br, 83Rb, and 89Y are investigated in the framework of the unified model.Each nucleus is considered to consist of an even–even vibrating core and extra-core proton quasiparticle. The quasiparticle–core interaction Hamiltonian is assumed to be given by a dipole plus a quadrupole term. The coupling of a g9/2 state to the vibrating core leads to the formation of states of positive parity with [Formula: see text]. Such states with I up to 11/2+ have been recently observed in the nuclei under investigation. In the case of negative parity states the extra core proton quasiparticle is assumed to have available the p3/2, p1/2, and ƒ5/2 states. Many features of the investigated nuclei are explained by the model at least qualitatively. The present calculations do not exhaust the possibility of improved results. Future experimental data will be highly desirable not only for testing but also for improving the model. </jats:p
Μελέτες σχετικά με τη σταθερότητα της λακτόνης
No full textThe theories of Bucourt concerning the stabilities of mono-and polycyclic compounds have been critically exarnined and modified. Ring strain (as measured by heats of combustion in the literature) may be calculated with irnproved accuracy by the modified theory. The theory has been further tested by a deterrnination of the stabilities (relative to the hydroxy-acids) in SO mole % aqueous tetrahydrofuran of the series of mono- and polycyclic 8 -lactones: y. y, 8 -trirnethyl- 8 - valerolactone, ~ and trans - 1-oxadecal-2-one, cis- and trans - 1-oxa-l0-methyldecal-Z-one, 6a-.!.-butyl-l-oxa-9a, 10 (3 -decal-Z-one, 6a -t-butyl-l-oxa-9(3, 10(3 -decal-Z-o~e, 4-oxa-5 U -estran-3-one, 4-oxa-SU-cholestan-3-one, and 4-oxa-S{3 -cholestan-3-one. Good agreement was found between experimental and ca1culated values, when account was taken of a hitherto unrecognized deformation of the cyc10hexane ring caused by bulky equatorial substituents. The effect of solvent composition on the equilibrium between y -hydroxybutyric acid and y -butyrolactone was studied using the solvents 0-80 mole % aqueous tetrahydrofuran, dioxane, acetone and dimethylsulfoxide. Minima and maxima of the ratio hydroxy-acid/lactone were observed as the water content decreased from 100%; the ratio at the minima and maxima decreased with rising temperature. Thermodynamic parameters have been calculated and explained in terms of an extension of current theories of the structure of aqueous organic solutions
Concerning the Decay of 2.6 h <sup>65</sup>Ni
No full text The decay of 65Ni has been investigated using Ge(Li) and NaI (Tl) detectors. The results support the existence of the following states in 65Cu with corresponding spin and parity assignments: 0(3/2+), 770.7(1/2−), 1115.5(5/2−), 1481.9(7/2−), 1623.5(5/2−). and 1725.0(3/2−) keV. </jats:p
Differential scattering cross‐sections for 8 keV photons in kapton and crystalline targets
No full text- …
