Bob,
Magnesium hydride does store more hydrogen than most metals and alloys - by weight, since magnesium is very low density - but the Space program in Europe and NASA use lanthanum nickel (LaNi5) for hydrogen storage. Rossi would have access to this alloy through U-Bologna. Low weight is not needed by the HotCat so my suspicion is that he uses a high-nickel alloy of some kind instead of magnesium. Lanthanum has magnetic properties that would favor its use in an active alloy. But Bob's observation that a starved mode startup is avoided by having the hydrogen stored as a metal hydride - is relevant no matter what the storage alloy. Nevertheless, the most logical conclusion for the lack of gammas in the HotCat is that the main energetic reaction produces none (or few). This would seem to eliminate "fusion" in favor of a reaction where the energy is derived in a reaction that does not produce high energy photons OR alphas OR betas, since the ceramic of the HotCat is completely transparent to low level radiation and even bremsstrahlung would have been noticed. From: Bob Higgins One of the differences between the HotCat and Rossi's original eCat was that the original devices were loaded with H2 and THEN heated. This allowed the H2 to be present while the eCat was heating to the reaction operating point (>300C). Apparently in this transition from cold to ~300C, there is a temperature at which the reaction begins in some "starved" mode where the gamma output is either greater amplitude or higher energy (allowing it to pass through the shielding) than when the operating temperature is reached. Once some kind of "saturated" condition is reached at the desired operating temperature, either the gamma amplitude subsides, or the gamma photon energy declines and it is substantially absorbed (thermalized) in the apparatus. In Rossi's HotCat, the H2 is supplied by a metal hydride, possibly MgH2. This hydride releases its H2 sharply upon reaching a critical temperature of about ~300C. This may allow the transition temperature range to be crossed without substantial H2 being present; thus avoiding the transition emissions. How the H2/hydride behaves in cool-down, I am not certain. In shutdown cooling, I am not sure that the H2 will be re-absorbed as sharply or at the same temperature. Absorbtion and de-absorbtion will also depend on the exact metal hydride used, its powder size, and whether or not something like a lithium borohydrate catalyst is used. This may mean that emissions are avoided in startup and operation, but not in shutdown. Jones Beene wrote: It is not me that is "insisting" on anything. The data indicates no gammas. Very thorough radiation testing of the HotCat concluded that no gamma radiation exists in that version. There may have been minor gamma radiation in the earlier ECat but it was orders of magnitude too little to account for the thermal gain. -----Original Message----- From: David ledin Why you insist that e-cat don't emit gamma ray while both rossi and focardi claimed otherwise.
