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There is a companion: Problemas de Física Moderna by the same authors (Acosta, López, Moreno). Some editions contain fully solved problems. Check:
Many universities (UNAM, Universidad de Buenos Aires, Universidad Politécnica de Madrid) host instructor resources. Ask your professor for access to the official Guía de Problemas or Solucionario Interno. If they won’t give you the PDF, they will give you the corrected answer to problem 320 directly. There is a companion: Problemas de Física Moderna
From the original Acosta book:
Una partícula de masa m y energía E incide desde la izquierda sobre una barrera de potencial rectangular de altura (V_0) y anchura a. Considerar el caso (E < V_0). Hallar el coeficiente de transmisión T y demostrar que para (a \gg 1/\alpha) se cumple (T \approx \frac16EV_0(1 - \fracEV_0) e^-2\alpha a). Una partícula de masa m y energía E
| Error in Unfixed Solucionario | Correction in Fixed Version | |------------------------------|-----------------------------| | Using (\sin^2(\alpha a)) instead of (\sinh^2(\alpha a)) | Correct hyperbolic function | | Forgetting factor of 4 in denominator | (4\fracEV_0(1-\fracEV_0)) | | Mislabeling transmission probability as ( \frac11+\frac\sinh^24 ) without energy fraction | Includes the energy ratio explicitly | | Numerical error in (\alpha) (using (V_0) instead of (V_0 - E)) | Correct definition: (\alpha = \sqrt2m(V_0-E)/\hbar) | | Error in Unfixed Solucionario | Correction in
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