No abstract available

[en] Total cross section for the ¹³C + ¹³C reaction has been determined over the range Esub(c.m.) = 4.00 - 15.5 MeV. The γ-ray yields are used to determine the cross sections for the formation of residual nuclei. Excitation functions reveal no evidence for intermediate structures or narrow resonances in this reaction. The results are in good agreement with predictions from a statistical model, calculation as coded in the computer program CASCADE

[en] Coincidence measurements have been made of both the electromagnetic and particle decays of the lowest T = 3/2 levels in ¹³C and ¹³N. Proton decays of ¹³N(T = 3/2) to negative parity levels in ¹²C at 9.64 and 10.84 MeV have been discovered using the ¹¹B(³He,np)¹²C reaction. The branching ratios for these d- or s-wave decays were found. Measurements of the α decays of the mirror T = 3/2 level in ¹³C have shown that less than 14 percent of the width of the ¹³C-(T = 3/2) level is accounted for by α decay to narrow states in ⁹Be. A careful comparison of the γ-ray transition strengths from the lowest T = 3/2 levels in ¹³C and ¹³N was made . The relative transition strength for the M1 decays to the 1/2^- ground state and 3/2^- second excited state was found. to be the same in ¹³C and ¹³N with a precision of +- 6.5 percent. The absolute γ-ray transition strengths in ¹³C and ¹³N have also been compared . The reduced E1 transition-strength to the 1/2⁺ first excited state was found.Upper limits of (5 - 10) x 10^-5 W.u. for several ΔT = 2E1 transitions from the two lowest T = 2 levels in ²⁰Ne. were obtained The ¹⁹F(³He, d γ)²⁰Ne reaction has been used in combination with previous measurements to infer a value for the radioactive width of 2⁺, T = 2 level in ²⁰Ne. The ¹⁹F(³He, dγ)²⁰Ne reaction has also been used to provide the first measurement of the γ-decay schemes for three levels in ²⁰Ne

[en] Abstract only

[en] Inclusion of 1% and 8.4% of the 2s and 2p configuration mixings in the Cohen-Kurath wave functions has been considered to reproduce the experimental results for the electron scattering from ¹³C leading to the final states ¹³ C(g.s.;1/2^-,1/2) and ¹³C(15.11 MeV;3/2^-,3/2). Effects of the meson-exchange currents have also been investigated microscopically on the basis of the Cohen-Kurath wave functions, and we have shown that they are important in the large momentum transfer regions. (Author)

No abstract available

[en] Bis-[¹³CO₂H]-mesobilirubin-XIIIα was synthesized in 11% overall yield in 10 steps from 99% enriched K¹³CN. The synthetic methods are adapted to a scale of a few grams to a few milligrams. (author)

[en] Short communication; 3 refs.; 1 fig

No abstract available

[en] A cracking chamber is described which has been designed for the preparation of carbon targets enriched in ¹³C of thickness ranging between 15 and 150 μg/cm². (orig.)