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3

The x-axis is labeled as pulse height, which means the height of the electronic signal produced by the detector. This is proportional to the energy of the detected photon; a more energetic photon will produce a larger signal. The y-axis is labeled N(E) dE, which means number of events recorded within a range dE of energy E. So the height of the curve tells ...


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The core reaction would be $$ n + \nu \longrightarrow p + e^- \,,$$ which respects all the necessary conservation laws (it's diagram is, after all, a rotation of the usual beta decay diagram). I am not aware of a measurement of this particular process, but $$ {}^{37}\mathrm{Cl} + \nu \longrightarrow {}^{37}\mathrm{Ar} + e^- $$ (which obviously has the same ...


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As @dmckee pointed out in his comment, Radium is just at the "top of the decay chain". Specifically the decay chain looks like this source Now these decays all look like $\alpha$ and $\beta$ emissions - none of which could be detected from any distance (since both are massive charged particles, they lose a lot of energy over a short range). We need to ...


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There is an intriguing possibility that the answer is yes, in a very fundamental way! All amino acids (except glycine) come in two chiralities, left-handed and right-handed, related by parity. However, all amino acids used in living beings are left-handed. Evidently, by chance, early in Earth's history, left-handed compounds gained an advantage somehow. ...



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