mucha charla

creo que estoy adelantado a mi época, aunque mi época sea ésta misma y no otra. Lo que quiero decir es, que el tiempo medido como referente universal varía según las culturas, y las culturas a su vez varían segun la geopolítica. Existen sociedades con culturas más avanzadas, en cuanto a lo social, el fenómeno social en sí difiere entre una y otra. Mi creencia es que, geneticamente mi comportamiento, digamos el fenómeno Yo, dentro del fenómeno más complejo llamado sociedad, y específicamente la complejidad del entorno medio con y en el que interactuo, es diferente estadistícamente. R glen meade



al video es de Willie Doherty grabado en mi celular en el laboratorio de arte alameda el último día del 2006.

...me encontré en la red

Systematic error estimation from the R-matrix calculation

Abstract. The ¹²C(α,γ)¹⁶O reaction rate at stellar helium burning temperatures is very important in nuclear astrophysics. The reduced α-widths of the 6.917 MeV and 7.117 MeV states in ¹⁶O will greatly influence the E2 and E1 transition part of the ¹²C(α,γ)¹⁶O reaction rate. It is known that one can determine the reduced α-width of the 6.917 MeV state in ¹⁶O by measuring the ¹²C(α,α)¹²C reaction. Many experimental efforts have gone into the study of an elastic scattering on ¹²C, where the systematic error of the reduced α-width of the 6.917 MeV state has to be very carefully analysed. An R-matrix calculation was performed to determine the systematic error of the reduced α-width of the 6.917 MeV state. A one-channel, and multi-level approximation in the R-matrix formalism was used, and the partial waves of l = 0 to l = 5 were included in the calculation. The calculated cross sections were fitted to the previous data. The dependence of the reduced α-width of the 6.917 MeV state in ¹⁶O on the detecting angle position, the incident beam energy and the absolute normalization constant of the cross section was obtained. Our analysis could be helpful in designing a new ¹²C(α,α)¹²C measurement, and determining the systematic error of the reduced α-width of the 6.917 MeV state in ¹⁶O.

Print publication: Issue 10 (October 2005)
Received 21 March 2005
Published 12 September 2005

tomado de acá.